[1] Univ Western Australia, Ctr Hlth Serv Res, Sch Populat & Global Hlth, 35 Stirling Hwy, Crawley, WA 6009, Australia
[2] Univ Alberta, Fac Nursing, Edmonton, AB T6G 1C9, Canada
[3] Univ Western Australia, Western Australia Ctr Rural Hlth, Sch Populat & Global Hlth, 35 Stirling Hwy, Crawley, WA 6009, Australia
[4] Univ Massachusetts, Sch Publ Hlth & Hlth Sci, Dept Nutr, Amherst, MA 01003 USA
[5] Univ Ibadan, Coll Med, Dept Nursing, Ibadan 200005, Nigeria
[6] Ctr Right Hlth, Abuja 904101, Nigeria
[7] Univ Ghana, Sch Nursing & Midwifery, Maternal & Child Hlth Dept, POB LG43, Accra, Ghana
[8] Univ Calgary, Cumming Sch Med, Dept Community Hlth Sci, Calgary, AB T2N 1N4, Canada