[1] Nanjing Med Univ, Affiliated Hosp 1, 300 Guangzhou Rd, Nanjing 210000, Jiangsu, Peoples R China
[2] Nanjing Med Univ, Sch Nursing, Nanjing, Peoples R China
[3] Nanjing Med Univ, Womens Hosp, Nanjing Matern & Child Hlth Care Hosp, Nanjing, Peoples R China
[4] Pukou Peoples Hosp, Nanjing, Peoples R China
[5] Nanjing Univ Chinese Med, Sch Nursing, Nanjing, Peoples R China