?:authorAffiliation
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[\'Beijing Hospital, National Center of Gerontology; Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, P.R. China.\', \'Graduate School of Peking Union Medical College and Chinese Academy of Medical Sciences, P.R. China.\', \'Department of Respiratory Medicine, Tianjin Binhai New Area Dagang Hospital, Tianjin, P.R. China.\']
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