[1] Fudan Univ, Huadong Hosp, Intens Care Unit, Shanghai, Peoples R China
[2] Fudan Univ, Sch Nursing, Shanghai, Peoples R China
[3] Univ Hong Kong, Li Ka Shing Fac Med, Sch Nursing, Hong Kong, Peoples R China
[4] Fudan Univ, Huadong Hosp, Nursing Dept, Shanghai, Peoples R China