1. Division of Urology; Department of Surgery; Woodstock Hospital; Woodstock ON Canada
2. Department of Epidemiology and Biostatistics; Imperial College London; London UK
3. Department of Urogynaecology; St. Mary's Hospital; London UK
4. Institute for Clinical Epidemiology and Biostatistics; Department of Clinical Research; University Hospital Basel; Basel Switzerland
5. Departments of Urology and Public Health; University of Helsinki and Helsinki University Hospital; Helsinki Finland
6. Department of Clinical Epidemiology and Biostatistics; McMaster University; Hamilton ON Canada
7. Department of Medicine; McMaster University; Hamilton ON Canada