1. College of Nursing, Inner Mongolia Minzu University, Tongliao, Inner Mongolia, 028000, China
2. Key Laboratory of Geriatric Nutrition and Health, Ministry of Education, Beijing Technology and Business University, 11 Fucheng Road, Haidian District, Beijing, 100048, P. R. China
3. The Third Healthcare Department of the 2nd Medical Center, Chinese PLA General Hospital, Beiing 100853, China
4. Pain Department, Eye Hospital China Academy of Chinese Medical Sciences, Beijing, 100040, China