1. CDC 2017 November 22, 2017 https://www.cdc.gov/std/stats16/Gonorrhea.htm
2. WHO 2012 Global action plan to control the spread and impact of antimicrobial resistance in Neisseria gonorrhoeae http://www.who.int/reproductivehealth/publications/rtis/9789241503501/en/
3. CDC 2017 October 2, 2017 https://www.cdc.gov/std/stats16/msm.htm
4. Will use of combination cephalosporin/azithromycin therapy forestall resistance to cephalosporins in Neisseria gonorrhoeae;Rice;Sex. Transm. Infect.,2015
5. Centers for Disease Control and Prevention (US) 2013 Antibiotic resistance threats in the United States