[1] Anglia Ruskin Univ, Fac Hlth Educ Med & Social Care, Cambridge, England
[2] Univ Auckland, Sch Nursing, Auckland, New Zealand
[3] Massey Univ, Sch Nursing, Albany, New Zealand
[4] James Cook Univ, Nursing Midwifery & Nutr, Cairns, Australia
[5] Univ Auckland, Fac Educ & Social Work, Auckland, New Zealand
[6] Univ Sheffield, Sch Nursing & Midwifery, Sheffield, S Yorkshire, England