1. Department of Anatomy; University of Otago; Dunedin New Zealand
2. Academic Urology Unit; University of Aberdeen; Aberdeen UK
3. c/o Cochrane Incontinence, Population Health Sciences Institute; Newcastle University; Newcastle upon Tyne UK
4. Clinical Service; St. Olavs Hospital, Trondheim University Hospital; Trondheim Norway
5. Population Health Sciences Institute; Newcastle University; Newcastle upon Tyne UK
6. Rehabilitation Teaching and Research Unit, Department of Medicine; University of Otago; Wellington New Zealand