1. Qinghai University, Xining, Qinghai 810016, People’s Republic of China
2. Department of Pulmonary and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610000, People’s Republic of China
3. Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining, Qinghai810001, People’s Republic of China
4. Qinghai University, Xining, Qinghai 810016, People’s Republic of China;