title: Editorial Comment.
authors.affiliation: Department of Urology, Seattle Children's Hospital, Seattle, Washington.
authors.forename: Kathleen
authors.initials: K
authors.lastname: Kieran
mesh_terms: D002648:Child; D005190:Family; D006801:Humans; D008297:Male; D009369:Neoplasms; D012306:Risk; D055101:Semen Analysis; D035781:Siblings