1. Aspetar Orthopedic & Sports Medicine Hospital; PO Box 29222 Doha Qatar
2. Australian Institute of Sports; Department of Physiology; Canberra Australia
3. Research Institute for Sport and Exercise; University of Canberra; ACT Australia
4. Qinghai Institute of Sports Science (QISS); Duoba National Altitude Training Base; Xining City Qinghai China