Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2319255337', 'doi': 'https://doi.org/10.5665/sleep.1040', 'title': 'The Heterogeneity of Obstructive Sleep Apnea (Predominant Obstructive vs Pure Obstructive Apnea)', 'display_name': 'The Heterogeneity of Obstructive Sleep Apnea (Predominant Obstructive vs Pure Obstructive Apnea)', 'publication_year': 2011, 'publication_date': '2011-05-31', 'ids': {'openalex': 'https://openalex.org/W2319255337', 'doi': 'https://doi.org/10.5665/sleep.1040', 'mag': '2319255337', 'pmid': 'https://pubmed.ncbi.nlm.nih.gov/21629362', 'pmcid': 'https://www.ncbi.nlm.nih.gov/pmc/articles/3099495'}, 'language': 'en', 'primary_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.5665/sleep.1040', 'pdf_url': 'https://academic.oup.com/sleep/article-pdf/34/6/745/26607831/aasm.34.6.745.pdf', 'source': {'id': 'https://openalex.org/S42921845', 'display_name': 'SLEEP', 'issn_l': '0161-8105', 'issn': ['0161-8105', '1550-9109'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310311648', 'host_organization_name': 'Oxford University Press', 'host_organization_lineage': ['https://openalex.org/P4310311647', 'https://openalex.org/P4310311648'], 'host_organization_lineage_names': ['University of Oxford', 'Oxford University Press'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref', 'pubmed'], 'open_access': {'is_oa': True, 'oa_status': 'bronze', 'oa_url': 'https://academic.oup.com/sleep/article-pdf/34/6/745/26607831/aasm.34.6.745.pdf', 'any_repository_has_fulltext': True}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5083821266', 'display_name': 'Ailiang Xie', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I135310074', 'display_name': 'University of Wisconsin–Madison', 'ror': 'https://ror.org/01y2jtd41', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I135310074']}, {'id': 'https://openalex.org/I4210141342', 'display_name': 'William S. Middleton Memorial Veterans Hospital', 'ror': 'https://ror.org/037xafn82', 'country_code': 'US', 'type': 'healthcare', 'lineage': ['https://openalex.org/I1322918889', 'https://openalex.org/I2799886695', 'https://openalex.org/I4210115976', 'https://openalex.org/I4210141342']}], 'countries': ['US'], 'is_corresponding': True, 'raw_author_name': 'Ailiang Xie', 'raw_affiliation_strings': ['Middleton Memorial Veterans Hospital, Madison, WI', 'Population Health Sciences, University of Wisconsin, Madison, WI'], 'affiliations': [{'raw_affiliation_string': 'Population Health Sciences, University of Wisconsin, Madison, WI', 'institution_ids': ['https://openalex.org/I135310074']}, {'raw_affiliation_string': 'Middleton Memorial Veterans Hospital, Madison, WI', 'institution_ids': ['https://openalex.org/I4210141342']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5076233435', 'display_name': 'Ajay R. Bedekar', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I135310074', 'display_name': 'University of Wisconsin–Madison', 'ror': 'https://ror.org/01y2jtd41', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I135310074']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Ajay Bedekar', 'raw_affiliation_strings': ['Department of Medicine, University of Wisconsin, Madison, WI'], 'affiliations': [{'raw_affiliation_string': 'Department of Medicine, University of Wisconsin, Madison, WI', 'institution_ids': ['https://openalex.org/I135310074']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5015495854', 'display_name': 'James B. Skatrud', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I135310074', 'display_name': 'University of Wisconsin–Madison', 'ror': 'https://ror.org/01y2jtd41', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I135310074']}, {'id': 'https://openalex.org/I4210141342', 'display_name': 'William S. Middleton Memorial Veterans Hospital', 'ror': 'https://ror.org/037xafn82', 'country_code': 'US', 'type': 'healthcare', 'lineage': ['https://openalex.org/I1322918889', 'https://openalex.org/I2799886695', 'https://openalex.org/I4210115976', 'https://openalex.org/I4210141342']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'James B. Skatrud', 'raw_affiliation_strings': ['Department of Medicine, University of Wisconsin, Madison, WI', 'Middleton Memorial Veterans Hospital, Madison, WI'], 'affiliations': [{'raw_affiliation_string': 'Department of Medicine, University of Wisconsin, Madison, WI', 'institution_ids': ['https://openalex.org/I135310074']}, {'raw_affiliation_string': 'Middleton Memorial Veterans Hospital, Madison, WI', 'institution_ids': ['https://openalex.org/I4210141342']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5084263124', 'display_name': 'Mihaela Teodorescu', 'orcid': 'https://orcid.org/0000-0002-4490-6926'}, 'institutions': [{'id': 'https://openalex.org/I135310074', 'display_name': 'University of Wisconsin–Madison', 'ror': 'https://ror.org/01y2jtd41', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I135310074']}, {'id': 'https://openalex.org/I4210141342', 'display_name': 'William S. Middleton Memorial Veterans Hospital', 'ror': 'https://ror.org/037xafn82', 'country_code': 'US', 'type': 'healthcare', 'lineage': ['https://openalex.org/I1322918889', 'https://openalex.org/I2799886695', 'https://openalex.org/I4210115976', 'https://openalex.org/I4210141342']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Mihaela Teodorescu', 'raw_affiliation_strings': ['Department of Medicine, University of Wisconsin, Madison, WI', 'Middleton Memorial Veterans Hospital, Madison, WI'], 'affiliations': [{'raw_affiliation_string': 'Department of Medicine, University of Wisconsin, Madison, WI', 'institution_ids': ['https://openalex.org/I135310074']}, {'raw_affiliation_string': 'Middleton Memorial Veterans Hospital, Madison, WI', 'institution_ids': ['https://openalex.org/I4210141342']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5081478101', 'display_name': 'Yuansheng Gong', 'orcid': 'https://orcid.org/0000-0002-3175-4281'}, 'institutions': [{'id': 'https://openalex.org/I135310074', 'display_name': 'University of Wisconsin–Madison', 'ror': 'https://ror.org/01y2jtd41', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I135310074']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Yuansheng Gong', 'raw_affiliation_strings': ['Department of Medicine, University of Wisconsin, Madison, WI'], 'affiliations': [{'raw_affiliation_string': 'Department of Medicine, University of Wisconsin, Madison, WI', 'institution_ids': ['https://openalex.org/I135310074']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5011098520', 'display_name': 'Jerome A. Dempsey', 'orcid': 'https://orcid.org/0000-0001-5979-6427'}, 'institutions': [{'id': 'https://openalex.org/I135310074', 'display_name': 'University of Wisconsin–Madison', 'ror': 'https://ror.org/01y2jtd41', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I135310074']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Jerome A. Dempsey', 'raw_affiliation_strings': ['Population Health Sciences, University of Wisconsin, Madison, WI'], 'affiliations': [{'raw_affiliation_string': 'Population Health Sciences, University of Wisconsin, Madison, WI', 'institution_ids': ['https://openalex.org/I135310074']}]}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 2, 'corresponding_author_ids': ['https://openalex.org/A5083821266'], 'corresponding_institution_ids': ['https://openalex.org/I135310074', 'https://openalex.org/I4210141342'], 'apc_list': {'value': 4018, 'currency': 'USD', 'value_usd': 4018, 'provenance': 'doaj'}, 'apc_paid': None, 'fwci': 3.492, 'has_fulltext': True, 'fulltext_origin': 'pdf', 'cited_by_count': 53, 'citation_normalized_percentile': {'value': 0.999946, 'is_in_top_1_percent': True, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 95, 'max': 96}, 'biblio': {'volume': '34', 'issue': '6', 'first_page': '745', 'last_page': '750'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10234', 'display_name': 'Sleep-Disordered Breathing and Health Outcomes', 'score': 1.0, 'subfield': {'id': 'https://openalex.org/subfields/2737', 'display_name': 'Physiology'}, 'field': {'id': 'https://openalex.org/fields/27', 'display_name': 'Medicine'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}, 'topics': [{'id': 'https://openalex.org/T10234', 'display_name': 'Sleep-Disordered Breathing and Health Outcomes', 'score': 1.0, 'subfield': {'id': 'https://openalex.org/subfields/2737', 'display_name': 'Physiology'}, 'field': {'id': 'https://openalex.org/fields/27', 'display_name': 'Medicine'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}, {'id': 'https://openalex.org/T11456', 'display_name': 'Neural Mechanisms of Respiratory Control and Homeostasis', 'score': 0.9997, 'subfield': {'id': 'https://openalex.org/subfields/2807', 'display_name': 'Endocrine and Autonomic Systems'}, 'field': {'id': 'https://openalex.org/fields/28', 'display_name': 'Neuroscience'}, 'domain': {'id': 'https://openalex.org/domains/1', 'display_name': 'Life Sciences'}}, {'id': 'https://openalex.org/T10322', 'display_name': 'Mechanical Ventilation in Respiratory Failure and ARDS', 'score': 0.9899, 'subfield': {'id': 'https://openalex.org/subfields/2740', 'display_name': 'Pulmonary and Respiratory Medicine'}, 'field': {'id': 'https://openalex.org/fields/27', 'display_name': 'Medicine'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/obstructive-sleep-apnea', 'display_name': 'Obstructive Sleep Apnea', 'score': 0.632482}], 'concepts': [{'id': 'https://openalex.org/C2776006263', 'wikidata': 'https://www.wikidata.org/wiki/Q16606552', 'display_name': 'Obstructive sleep apnea', 'level': 2, 'score': 0.9534727}, {'id': 'https://openalex.org/C71924100', 'wikidata': 'https://www.wikidata.org/wiki/Q11190', 'display_name': 'Medicine', 'level': 0, 'score': 0.8116119}, {'id': 'https://openalex.org/C2779547634', 'wikidata': 'https://www.wikidata.org/wiki/Q5165502', 'display_name': 'Continuous positive airway pressure', 'level': 3, 'score': 0.5812541}, {'id': 'https://openalex.org/C105922876', 'wikidata': 'https://www.wikidata.org/wiki/Q1423981', 'display_name': 'Airway', 'level': 2, 'score': 0.55779517}, {'id': 'https://openalex.org/C42219234', 'wikidata': 'https://www.wikidata.org/wiki/Q131130', 'display_name': 'Anesthesia', 'level': 1, 'score': 0.5140875}, {'id': 'https://openalex.org/C164705383', 'wikidata': 'https://www.wikidata.org/wiki/Q10379', 'display_name': 'Cardiology', 'level': 1, 'score': 0.49443126}, {'id': 'https://openalex.org/C2781326671', 'wikidata': 'https://www.wikidata.org/wiki/Q754424', 'display_name': 'Apnea', 'level': 2, 'score': 0.49020225}, {'id': 'https://openalex.org/C126322002', 'wikidata': 'https://www.wikidata.org/wiki/Q11180', 'display_name': 'Internal medicine', 'level': 1, 'score': 0.3963116}], 'mesh': [{'descriptor_ui': 'D015656', 'descriptor_name': 'Respiratory Mechanics', 'qualifier_ui': 'Q000502', 'qualifier_name': 'physiology', 'is_major_topic': True}, {'descriptor_ui': 'D020182', 'descriptor_name': 'Sleep Apnea, Central', 'qualifier_ui': 'Q000503', 'qualifier_name': 'physiopathology', 'is_major_topic': True}, {'descriptor_ui': 'D020181', 'descriptor_name': 'Sleep Apnea, Obstructive', 'qualifier_ui': 'Q000503', 'qualifier_name': 'physiopathology', 'is_major_topic': True}, {'descriptor_ui': 'D000328', 'descriptor_name': 'Adult', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D045422', 'descriptor_name': 'Continuous Positive Airway Pressure', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D003430', 'descriptor_name': 'Cross-Sectional Studies', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D005260', 'descriptor_name': 'Female', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D006801', 'descriptor_name': 'Humans', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D008297', 'descriptor_name': 'Male', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D008875', 'descriptor_name': 'Middle Aged', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D017286', 'descriptor_name': 'Polysomnography', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D014109', 'descriptor_name': 'Total Lung Capacity', 'qualifier_ui': 'Q000502', 'qualifier_name': 'physiology', 'is_major_topic': False}], 'locations_count': 4, 'locations': [{'is_oa': True, 'landing_page_url': 'https://doi.org/10.5665/sleep.1040', 'pdf_url': 'https://academic.oup.com/sleep/article-pdf/34/6/745/26607831/aasm.34.6.745.pdf', 'source': {'id': 'https://openalex.org/S42921845', 'display_name': 'SLEEP', 'issn_l': '0161-8105', 'issn': ['0161-8105', '1550-9109'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310311648', 'host_organization_name': 'Oxford University Press', 'host_organization_lineage': ['https://openalex.org/P4310311647', 'https://openalex.org/P4310311648'], 'host_organization_lineage_names': ['University of Oxford', 'Oxford University Press'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': True, 'landing_page_url': 'https://europepmc.org/articles/pmc3099495', 'pdf_url': 'https://europepmc.org/articles/pmc3099495?pdf=render', 'source': {'id': 'https://openalex.org/S4306400806', 'display_name': 'Europe PMC (PubMed Central)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1303153112', 'host_organization_name': 'European Bioinformatics Institute', 'host_organization_lineage': ['https://openalex.org/I1303153112'], 'host_organization_lineage_names': ['European Bioinformatics Institute'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': True, 'landing_page_url': 'https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3099495', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S2764455111', 'display_name': 'PubMed Central', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1299303238', 'host_organization_name': 'National Institutes of Health', 'host_organization_lineage': ['https://openalex.org/I1299303238'], 'host_organization_lineage_names': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': False, 'landing_page_url': 'https://pubmed.ncbi.nlm.nih.gov/21629362', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306525036', 'display_name': 'PubMed', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1299303238', 'host_organization_name': 'National Institutes of Health', 'host_organization_lineage': ['https://openalex.org/I1299303238'], 'host_organization_lineage_names': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.5665/sleep.1040', 'pdf_url': 'https://academic.oup.com/sleep/article-pdf/34/6/745/26607831/aasm.34.6.745.pdf', 'source': {'id': 'https://openalex.org/S42921845', 'display_name': 'SLEEP', 'issn_l': '0161-8105', 'issn': ['0161-8105', '1550-9109'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310311648', 'host_organization_name': 'Oxford University Press', 'host_organization_lineage': ['https://openalex.org/P4310311647', 'https://openalex.org/P4310311648'], 'host_organization_lineage_names': ['University of Oxford', 'Oxford University Press'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'sustainable_development_goals': [], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 35, 'referenced_works': ['https://openalex.org/W1559698714', 'https://openalex.org/W1912553068', 'https://openalex.org/W1942386699', 'https://openalex.org/W1949956031', 'https://openalex.org/W1966890503', 'https://openalex.org/W1968771781', 'https://openalex.org/W1972510168', 'https://openalex.org/W1992508448', 'https://openalex.org/W1997557472', 'https://openalex.org/W2005837739', 'https://openalex.org/W2009978651', 'https://openalex.org/W2031929064', 'https://openalex.org/W2032440381', 'https://openalex.org/W2047411682', 'https://openalex.org/W2050577203', 'https://openalex.org/W2061427488', 'https://openalex.org/W2069934712', 'https://openalex.org/W2098467186', 'https://openalex.org/W2106478543', 'https://openalex.org/W2132327194', 'https://openalex.org/W2133285098', 'https://openalex.org/W2135126391', 'https://openalex.org/W2135299483', 'https://openalex.org/W2143008299', 'https://openalex.org/W2143675664', 'https://openalex.org/W2156299984', 'https://openalex.org/W2158309389', 'https://openalex.org/W2162645075', 'https://openalex.org/W2162945592', 'https://openalex.org/W2169223577', 'https://openalex.org/W2195377795', 'https://openalex.org/W2291651384', 'https://openalex.org/W2309925718', 'https://openalex.org/W2336763056', 'https://openalex.org/W2525537354'], 'related_works': ['https://openalex.org/W4385898410', 'https://openalex.org/W4230460856', 'https://openalex.org/W2665037477', 'https://openalex.org/W2485078096', 'https://openalex.org/W2411590714', 'https://openalex.org/W2317180131', 'https://openalex.org/W2309526699', 'https://openalex.org/W2297097411', 'https://openalex.org/W2066706307', 'https://openalex.org/W1853627846'], 'abstract_inverted_index': {'Study': [0], 'Objectives:To': [1], 'compare': [2], 'the': [3], 'breathing': [4], 'instability': [5], 'and': [6, 21, 29], 'upper': [7], 'airway': [8], 'collapsibility': [9], 'between': [10], 'patients': [11, 22], 'with': [12, 23], 'pure': [13], 'OSA': [14, 25], '(i.e.': [15], '100%': [16], 'of': [17], 'apneas': [18], 'are': [19], 'obstructive)': [20], 'predominant': [24], '(i.e.,': [26], 'coexisting': [27], 'obstructive': [28], 'central': [30], 'apneas).': [31]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2319255337', 'counts_by_year': [{'year': 2024, 'cited_by_count': 2}, {'year': 2023, 'cited_by_count': 4}, {'year': 2022, 'cited_by_count': 3}, {'year': 2021, 'cited_by_count': 5}, {'year': 2020, 'cited_by_count': 1}, {'year': 2019, 'cited_by_count': 1}, {'year': 2018, 'cited_by_count': 3}, {'year': 2017, 'cited_by_count': 9}, {'year': 2016, 'cited_by_count': 2}, {'year': 2015, 'cited_by_count': 5}, {'year': 2014, 'cited_by_count': 7}, {'year': 2013, 'cited_by_count': 5}, {'year': 2012, 'cited_by_count': 4}], 'updated_date': '2024-09-17T17:34:16.179735', 'created_date': '2016-06-24'}