[1] Peking Union Med Coll Hosp, Minist Hlth, Key Lab Endocrinol, Dept Endocrinol, Beijing 100730, Peoples R China
[2] Beijing Jishuitan Hosp, Dept Endocrinol, Beijing 100035, Peoples R China
[3] Peking Union Med Coll Hosp, Dept Nutr, Beijing 100730, Peoples R China
[4] Nankou Community Hlth Serv Ctr, Beijing 102200, Peoples R China
[5] Nankou Railway Hosp, Beijing 102200, Peoples R China