title: Age of onset of pain symptoms in non-twin sisters concordant for endometriosis.
authors.affiliation: Nuffield Department of Obstetrics & Gynaecology, University of Oxford, John Radcliffe Hospital, UK.
authors.forename: S
authors.initials: S
authors.lastname: Kennedy
authors.forename: R
authors.initials: R
authors.lastname: Hadfield
authors.forename: H
authors.initials: H
authors.lastname: Mardon
authors.forename: D
authors.initials: D
authors.lastname: Barlow
mesh_terms: D000328:Adult; D017668:Age of Onset; D003949:Diagnostic Techniques, Surgical; D004715:Endometriosis / Q000150:complications* / Q000175:diagnosis / Q000235:genetics*; D005260:Female; D006801:Humans; D010146:Pain / Q000453:epidemiology* / Q000209:etiology*; D012044:Regression Analysis