1. Department of Physical Therapy, University of Toronto, Canada
2. Department of Obstetrics and Gynecology, School of Medical Sciences, Universidade Estadual de Campinas, SP, Brazil
3. Department of Obstetrics and Gynecology, Hospital de Clínicas de Porto Alegre, RS, Brazil
4. Department of Public Health, Otago Medical School, University of Otago, New Zeland
5. School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, London, Ontario, Canada