1. Faculty of MedicineUniversity of British ColumbiaVancouverBritish ColumbiaCanada
2. Providence Health Care/St Paul's Hospital Physiotherapy DepartmentVancouverBritish ColumbiaCanada
3. Department of Obstetrics and GynecologyUniversity of British ColumbiaVancouverBritish ColumbiaCanada
4. Centre for Health Evaluation and Outcome SciencesUniversity of British ColumbiaVancouverBritish ColumbiaCanada