[1] Univ Sydney, Fac Med & Hlth, Susan Wakil Sch Nursing & Midwifery, Sydney Nursing Sch, Sydney, NSW 2006, Australia
[2] Westmead Hosp, Dept Neurosurg, Western Sydney Local Hlth Dist, Westmead, NSW, Australia
[3] Royal Rehab Grp, Res Off, Milsons Point, NSW, Australia
[4] Univ Technol Sydney, Fac Hlth, Ultimo, NSW, Australia
[5] Northern Sydney Local Hlth Dist, Mental Hlth Drug & Alcohol Serv, Ryde, NSW, Australia