1 West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China.
2 School of Public Health, the key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang 550025, China.
3 Kunming Medical University, Kunming, Yunnan, China.
4 Baoshan College of Traditional Chinese Medicine, Baoshan, Yunnan, China.
5 Chongqing Centre for Disease Control and Prevention, Chongqing, China.
6 Sichuan Provincial Hospital for Women and Children (Affiliated Women and Children's Hospital of Chengdu Medical College), Chengdu, China.
7 Chengdu Centre for Disease Control and Prevention, Chengdu, Sichuan, China.
8 Tibet Centre for Disease Control and Prevention, Lhasa, Tibet, China.
9 High Altitude Medical Research Centre, School of Medicine, Tibet University, Lhasa, Tibet, China.