[1] Natl Univ Singapore, Yong Loo Lin Sch Med, Alice Lee Ctr Nursing Studies, Clin Res Ctr, Level 2,Block MD 11,10 Med Dr, Singapore 117597, Singapore
[2] Jonkoping Univ, Sch Hlth & Welf, Jonkoping, Sweden
[3] Tan Tock Seng Hosp, Dept Educ & Practice, Nursing Serv, Singapore, Singapore
[4] Natl Univ Singapore Hosp, Nursing Educ, Singapore, Singapore