[1] Univ British Columbia, Sch Nursing, Vancouver, BC, Canada
[2] Univ British Columbia, Birth Pl Lab, Fac Med, Vancouver, BC, Canada
[3] Univ British Columbia, UBC Midwifery, Fac Med, Vancouver, BC, Canada
[4] Fac Med, Midwifery Program, Birth Pl Lab, Dept Family Practice, Vancouver, BC, Canada
[5] NHS England & NHS Improvement, Skipton House, London, England
[6] UBC Sch Nursing, Vancouver, BC, Canada