1 Institute of High Altitude Medicine, Tibet Autonomous Region People's Hospital, 18 Linkuo North Road, Chengguan District, Lhasa, Tibet Autonomous Region, People's Republic of China.
2 Institute of High Altitude Medicine, Tibet Autonomous Region People's Hospital, 18 Linkuo North Road, Chengguan District, Lhasa, Tibet Autonomous Region, People's Republic of China. [email protected].