[1] Natl Univ Singapore, Alice Lee Ctr Nursing Studies, MD 11,10 Med Dr, Singapore, Singapore
[2] Natl Univ Singapore Hosp, Evidence Based Ctr, 5 Lower Kent Ridge Rd, Singapore, Singapore
[3] Natl Univ Singapore Hosp, Intens Care Unit, 5 Lower Kent Ridge Rd, Singapore, Singapore
[4] Hubei Univ Med, Sch Nursing, 30 South Renmin Rd, Shiyan 442000, Peoples R China