title: Reply by the authors.
authors.affiliation: Center for Reproductive Medicine, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong, China.
authors.forename: Zi-Jiang
authors.initials: ZJ
authors.lastname: Chen
mesh_terms: D053713:Azoospermia / Q000235:genetics*; D019005:Cystic Fibrosis Transmembrane Conductance Regulator / Q000235:genetics*; D006801:Humans; D008297:Male; D014649:Vas Deferens / Q000002:abnormalities*
chemical_list: D019005:Cystic Fibrosis Transmembrane Conductance Regulator