SLC9A3 and congenital bilateral aplasia of vas deferens from CFTR mutation: We previously performed genome-wide mapping of copy-number variations through oligonucleotide array-based comparative genomic hybridization (CGH) and identified loss of solute carrier family 9 isoform 3 (SLC9A3) allele in Taiwanese men with CBAVD (in two of seven Taiwanese men with CBAVD) [17].