Sample collection protocol for male participants. Superscript numbers indicate procedures: 1, gonococcal culture; 2, Gen-Probe Aptima unisex swab specimen collection kit for male urethral swab specimens; 4, Abbott multi-Collect specimen collection kit; 6, Gen-Probe Aptima urine specimen collection kit for urine specimens; 7, Becton Dickinson ProbeTec ET urine processing kit for urine specimens.