1. Department of Marine Biomedicine and Polar Medicine Naval Medical Center of PLA Naval Medical University Xiangyin Road 800 Shanghai 200433 P. R. China
2. Department of Endocrinology Changzheng Hospital Naval Medical University Shanghai 200003 P. R. China
3. College of Basic Medical Sciences Experimental Teaching Center Naval Medical University Shanghai 200433 China
4. WLSA Shanghai Academy Shanghai 2004333 P. R. China