1. Biological Anthropology Institute, College of Basic Medical Science, Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
2. Department of Nursing, Shijiazhuang Medical College, Shijiazhuang, Hebei 050599, P.R. China
3. Department of Cardiology, Jinzhou Central Hospital, Jinzhou, Liaoning, 121001, P.R. China