1. Physiological Research Group of the Ministry of Railroad, P. R. China.
2. National Key Laboratory of High Altitude Medicine, High Altitude Medical Research Institute, Qinghai, P. R. China.
3. Qinghai–Tibet Railroad Hospitals of the Construction Company, Golmud, P. R. China.
4. Department of Cardiovascular Diseases, Qinghai Hospital of Railway, Xining, P. R. China.
5. China Railroad Construction Company, Beijing, P. R. China.
6. Institut des sciences du mouvement et de la macute médecine du sport, Faculté de médecine, Université de Genève, Geneva, Switzerland.