Research Article Hui Yang, Hui Yang Academy of Military Medical Sciences, Institute of Health & Environmental Medicine, Tianjin, China. Search for more papers by this author Chao Liu, Chao Liu Academy of Military Medical Sciences, Institute of Health & Environmental Medicine, Tianjin, China. Search for more papers by this author Danfeng Yang, Corresponding Author Danfeng Yang yanghui813@hotmail.com Academy of Military Medical Sciences, Institute of Health & Environmental Medicine, Tianjin, China.