Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W238117016', 'doi': 'https://doi.org/10.1007/978-94-011-8140-2_25', 'title': 'The normal placenta', 'display_name': 'The normal placenta', 'publication_year': 1982, 'publication_date': '1982-01-01', 'ids': {'openalex': 'https://openalex.org/W238117016', 'doi': 'https://doi.org/10.1007/978-94-011-8140-2_25', 'mag': '238117016'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1007/978-94-011-8140-2_25', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306463937', 'display_name': 'Springer eBooks', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/P4310319965', 'host_organization_name': 'Springer Nature', 'host_organization_lineage': ['https://openalex.org/P4310319965'], 'host_organization_lineage_names': ['Springer Nature'], 'type': 'ebook platform'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'book-chapter', 'type_crossref': 'book-chapter', 'indexed_in': ['crossref'], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5034413664', 'display_name': 'H.P. van Geijn', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I865915315', 'display_name': 'Vrije Universiteit Amsterdam', 'ror': 'https://ror.org/008xxew50', 'country_code': 'NL', 'type': 'education', 'lineage': ['https://openalex.org/I865915315']}], 'countries': ['NL'], 'is_corresponding': False, 'raw_author_name': 'H. P. Van Geijn', 'raw_affiliation_strings': ['Department of Obstetrics and Gynecology, Academisch Ziekenhuis der Vrije Universiteit, Amsterdam, The Netherlands'], 'affiliations': [{'raw_affiliation_string': 'Department of Obstetrics and Gynecology, Academisch Ziekenhuis der Vrije Universiteit, Amsterdam, The Netherlands', 'institution_ids': ['https://openalex.org/I865915315']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5037700955', 'display_name': 'Seppo Parkkila', 'orcid': 'https://orcid.org/0000-0001-7323-8536'}, 'institutions': [{'id': 'https://openalex.org/I34809795', 'display_name': 'Medizinische Hochschule Hannover', 'ror': 'https://ror.org/00f2yqf98', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I34809795']}], 'countries': ['DE'], 'is_corresponding': False, 'raw_author_name': 'M. Castellucci', 'raw_affiliation_strings': ['Department of Electronmicroscopy, Medizinische Hochschule, Hannover, West Germany'], 'affiliations': [{'raw_affiliation_string': 'Department of Electronmicroscopy, Medizinische Hochschule, Hannover, West Germany', 'institution_ids': ['https://openalex.org/I34809795']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5042903400', 'display_name': 'Peter Kaufmann', 'orcid': 'https://orcid.org/0000-0003-0459-2464'}, 'institutions': [{'id': 'https://openalex.org/I159176309', 'display_name': 'Universität Hamburg', 'ror': 'https://ror.org/00g30e956', 'country_code': 'DE', 'type': 'education', 'lineage': ['https://openalex.org/I159176309']}], 'countries': ['DE'], 'is_corresponding': False, 'raw_author_name': 'P. Kaufmann', 'raw_affiliation_strings': ['Department of Anatomy, University of Hamburg, Hamburg, West Germany'], 'affiliations': [{'raw_affiliation_string': 'Department of Anatomy, University of Hamburg, Hamburg, West Germany', 'institution_ids': ['https://openalex.org/I159176309']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5051560890', 'display_name': 'Peter Kenemans', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I145872427', 'display_name': 'Radboud University Nijmegen', 'ror': 'https://ror.org/016xsfp80', 'country_code': 'NL', 'type': 'education', 'lineage': ['https://openalex.org/I145872427']}], 'countries': ['NL'], 'is_corresponding': False, 'raw_author_name': 'P. Kenemans', 'raw_affiliation_strings': ['Department of Obstetrics and Gynecology, University Hospital Sint Radboud, Nijmegen, The Netherlands'], 'affiliations': [{'raw_affiliation_string': 'Department of Obstetrics and Gynecology, University Hospital Sint Radboud, Nijmegen, The Netherlands', 'institution_ids': ['https://openalex.org/I145872427']}]}], 'institution_assertions': [], 'countries_distinct_count': 2, 'institutions_distinct_count': 4, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': None, 'apc_paid': None, 'fwci': 0.0, 'has_fulltext': False, 'cited_by_count': 2, 'citation_normalized_percentile': {'value': 0.0, 'is_in_top_1_percent': False, 'is_in_top_10_percent': False}, 'cited_by_percentile_year': {'min': 62, 'max': 67}, 'biblio': {'volume': None, 'issue': None, 'first_page': '231', 'last_page': '241'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T10290', 'display_name': 'Pathophysiology and Management of Preeclampsia', 'score': 0.9498, 'subfield': {'id': 'https://openalex.org/subfields/2729', 'display_name': 'Obstetrics and Gynecology'}, '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/T10290', 'display_name': 'Pathophysiology and Management of Preeclampsia', 'score': 0.9498, 'subfield': {'id': 'https://openalex.org/subfields/2729', 'display_name': 'Obstetrics and Gynecology'}, '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/intervillous-space', 'display_name': 'Intervillous space', 'score': 0.97390723}, {'id': 'https://openalex.org/keywords/chorionic-villi', 'display_name': 'Chorionic villi', 'score': 0.79609287}, {'id': 'https://openalex.org/keywords/trophoblast', 'display_name': 'Trophoblast', 'score': 0.59369993}, {'id': 'https://openalex.org/keywords/placental-development', 'display_name': 'Placental Development', 'score': 0.480238}, {'id': 'https://openalex.org/keywords/fetal-membrane', 'display_name': 'Fetal membrane', 'score': 0.45703402}], 'concepts': [{'id': 'https://openalex.org/C79919700', 'wikidata': 'https://www.wikidata.org/wiki/Q6057436', 'display_name': 'Intervillous space', 'level': 5, 'score': 0.97390723}, {'id': 'https://openalex.org/C2776953305', 'wikidata': 'https://www.wikidata.org/wiki/Q1212935', 'display_name': 'Placenta', 'level': 4, 'score': 0.86147267}, {'id': 'https://openalex.org/C2781385326', 'wikidata': 'https://www.wikidata.org/wiki/Q2272222', 'display_name': 'Chorionic villi', 'level': 5, 'score': 0.79609287}, {'id': 'https://openalex.org/C172680121', 'wikidata': 'https://www.wikidata.org/wiki/Q26513', 'display_name': 'Fetus', 'level': 3, 'score': 0.6844183}, {'id': 'https://openalex.org/C2776193487', 'wikidata': 'https://www.wikidata.org/wiki/Q32846', 'display_name': 'Basement membrane', 'level': 2, 'score': 0.6236968}, {'id': 'https://openalex.org/C2777495146', 'wikidata': 'https://www.wikidata.org/wiki/Q1889778', 'display_name': 'Trophoblast', 'level': 5, 'score': 0.59369993}, {'id': 'https://openalex.org/C518705261', 'wikidata': 'https://www.wikidata.org/wiki/Q25615', 'display_name': 'Connective tissue', 'level': 2, 'score': 0.50065994}, {'id': 'https://openalex.org/C2780899479', 'wikidata': 'https://www.wikidata.org/wiki/Q5445907', 'display_name': 'Fetal membrane', 'level': 5, 'score': 0.45703402}, {'id': 'https://openalex.org/C105702510', 'wikidata': 'https://www.wikidata.org/wiki/Q514', 'display_name': 'Anatomy', 'level': 1, 'score': 0.4438078}, {'id': 'https://openalex.org/C86803240', 'wikidata': 'https://www.wikidata.org/wiki/Q420', 'display_name': 'Biology', 'level': 0, 'score': 0.38489455}, {'id': 'https://openalex.org/C2779234561', 'wikidata': 'https://www.wikidata.org/wiki/Q11995', 'display_name': 'Pregnancy', 'level': 2, 'score': 0.32637084}, {'id': 'https://openalex.org/C16685009', 'wikidata': 'https://www.wikidata.org/wiki/Q335057', 'display_name': 'Andrology', 'level': 1, 'score': 0.3227544}, {'id': 'https://openalex.org/C131872663', 'wikidata': 'https://www.wikidata.org/wiki/Q5284418', 'display_name': 'Obstetrics', 'level': 1, 'score': 0.32257706}, {'id': 'https://openalex.org/C142724271', 'wikidata': 'https://www.wikidata.org/wiki/Q7208', 'display_name': 'Pathology', 'level': 1, 'score': 0.3190188}, {'id': 'https://openalex.org/C71924100', 'wikidata': 'https://www.wikidata.org/wiki/Q11190', 'display_name': 'Medicine', 'level': 0, 'score': 0.2981508}, {'id': 'https://openalex.org/C54355233', 'wikidata': 'https://www.wikidata.org/wiki/Q7162', 'display_name': 'Genetics', 'level': 1, 'score': 0.0}], 'mesh': [], 'locations_count': 1, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1007/978-94-011-8140-2_25', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306463937', 'display_name': 'Springer eBooks', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/P4310319965', 'host_organization_name': 'Springer Nature', 'host_organization_lineage': ['https://openalex.org/P4310319965'], 'host_organization_lineage_names': ['Springer Nature'], 'type': 'ebook platform'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [{'id': 'https://metadata.un.org/sdg/2', 'score': 0.74, 'display_name': 'Zero hunger'}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 5, 'referenced_works': ['https://openalex.org/W1554389925', 'https://openalex.org/W188729641', 'https://openalex.org/W2086703338', 'https://openalex.org/W2883120224', 'https://openalex.org/W570382839'], 'related_works': ['https://openalex.org/W4241304794', 'https://openalex.org/W2391196319', 'https://openalex.org/W238117016', 'https://openalex.org/W2123375603', 'https://openalex.org/W2098209538', 'https://openalex.org/W2081192013', 'https://openalex.org/W2041478977', 'https://openalex.org/W2003265927', 'https://openalex.org/W1978417711', 'https://openalex.org/W145106435'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W238117016', 'counts_by_year': [], 'updated_date': '2024-09-25T08:47:38.291902', 'created_date': '2016-06-24'}