{{Cite journal| doi = 10.1136/sti.2009.036939| volume = 86| issue = 2| pages = 136–140| last1 = Henry| first1 = Emile| last2 = Marcellin| first2 = Fabienne| last3 = Yomb| first3 = Yves| last4 = Fugon| first4 = Lionel| last5 = Nemande| first5 = Steave| last6 = Gueboguo| first6 = Charles| last7 = Larmarange| first7 = Joseph| last8 = Trenado| first8 = Emmanuel Eboko| last9 = Spire| first9 = Bruno| title = Factors associated with unprotected anal intercourse among men who have sex with men in Douala, Cameroon| journal = Sexually Transmitted Infections| date = 2010}}