Li, Xiaoling, Department of Nutrition, Hebei Province Key Laboratory of Nutrition and Health, The First Hospital of Hebei Medical University, Shijiazhuang, Hebei Province, China, College of Nursing, Hebei University of Chinese Medicine, Shijiazhuang, Hebei Province, China; and School of Nursing, Hebei Medical University, Shijiazhuang, Hebei Province, China, China