[1] Clin Res Ctr, Yong Loo Lin Sch Med, Alice Lee Ctr Nursing Studies, Singapore 117597, Singapore
[2] Concord Hosp, Sydney Local Hlth Dist, Concord Ctr Mental Hlth, Sydney, NSW, Australia
[3] Univ Western Sydney, Sch Nursing & Midwifery, Sydney, NSW, Australia
[4] Univ Technol Sydney, Fac Nursing Midwifery & Hlth, Sydney, NSW 2007, Australia
[5] Univ Sydney, Discipline Psychiat, Sydney, NSW 2006, Australia