1. Research Center for High Altitude Medicine, Qinghai University, Xining, Qinghai, P.R. China.
2. Department of Cardiology, Qinghai Provincial Women's and Children's Hospital, Xining, Qinghai, P.R. China.
3. Department of MRI, Affiliated Hospital of Qinghai University, Xining, 810000, Qinghai, P.R. China.