?:authorAffiliation
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[\'Department of Respiratory Medicine, Beijing Rehabilitation Hospital, Capital Medical University, Beijing, People\'s Republic of China.\', \'Department of Respiratory and Infections Medicine, Beijing You An Hospital, Capital Medical University, Beijing, People\'s Republic of China.\', \'Department of Respiratory and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, The Clinical Research Center, Beijing Chaoyang Hospital, Capital Medical University, Beijing, People\'s Republic of China.\', \'Department of Epidemiology, Tulane University School of Public Health and Tropical Medicine, New Orleans, LA.\']
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