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220, 232, 244, 252, 272], 'be': [66, 89, 233, 273], 'approved': [67], 'ED.': [71], 'More': [72], 'than': [73], '10': [74], 'million': [75], 'men': [76], 'worldwide': [77], 'treated': [80], 'with': [81, 117, 239], 'drug.': [83], 'has': [85, 214], 'shown': [87], 'generally': [90, 234], 'effective': [91, 202], 'ED,': [96, 265], 'although': [97, 169], 'degree': [99], 'efficacy': [101], 'varies': [102], 'according': [103], 'etiology': [106], 'severity': [108], 'disorder.': [111], 'well': [115, 237], 'tolerated,': [116, 238], 'relatively': [118], 'few': [119], 'contraindications': [120], '(e.g.,': [121], 'nitrates)': [122], 'safety': [124], 'risks.': [125], 'cardiovascular': [127], 'effects': [128], 'sildenafil,': [130, 221], 'particular,': [132], 'extensively': [135], 'investigated.': [136], 'results': [138, 170], 'recent': [140], 'studies': [141, 251], 'suggest': [142], 'sildenafil': [144], 'may': [145], 'an': [147], 'additional': [148, 176], 'role': [149], 'other': [154], 'male': [155], 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'addressed': [274], 'their': [276], 'clinical': [277], 'use.': [278], 'potential': [280], 'impact': [281], 'on': [282], 'societal': [283], 'attitudes': [284], 'toward': [285], 'sexuality': [286], 'also': [290], 'warrants': [291], 'consideration.': [292]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W1566391955', 'counts_by_year': [{'year': 2024, 'cited_by_count': 1}, {'year': 2022, 'cited_by_count': 4}, {'year': 2021, 'cited_by_count': 2}, {'year': 2020, 'cited_by_count': 1}, {'year': 2019, 'cited_by_count': 2}, {'year': 2018, 'cited_by_count': 2}, {'year': 2017, 'cited_by_count': 3}, {'year': 2016, 'cited_by_count': 4}, {'year': 2015, 'cited_by_count': 1}, {'year': 2014, 'cited_by_count': 5}, {'year': 2013, 'cited_by_count': 1}, {'year': 2012, 'cited_by_count': 5}], 'updated_date': '2024-12-15T05:37:24.741374', 'created_date': '2016-06-24'}