title: In reply.
authors.forename: Eberhard
authors.initials: E
authors.lastname: Nieschlag
mesh_terms: D005820:Genetic Testing / Q000379:methods*; D006801:Humans; D007248:Infertility, Male / Q000175:diagnosis* / Q000628:therapy*; D007713:Klinefelter Syndrome / Q000175:diagnosis* / Q000628:therapy*; D008297:Male