RT Journal Article SR Electronic T1 Postvasectomy Semen Analysis JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 327 OP 327 DO 10.3122/jabfm.18.4.327 VO 18 IS 4 A1 Ramakrishnan, K. YR 2005 UL http://www.jabfm.org/content/18/4/327.abstract AB