|  | Pelvic Organ Prolapse Questionnaire Prolapse Symptoms Female | 
                                            
	|  | 1. Dept of Urogynaecology, St Mary's Hospital, London, UK, 2. Department of Epidemiology & Biostatistics, Imperial College London, UK, 3. Department of Clinical Epidemiology, McMaster University, Hamilton, Canada, 4. Department of Twin Research & Genetic Epidemiology, King's College London, UK |