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\bibitem{Seydel1999} Seydel, S. M. (1999). \textit{Schlussbericht BAG-Projekt {\textquotedblleft}MEDIA -- Face 2 Face{\textquotedblright} 1997-1998 : Pr{\"a}vention von sexuellen HIV-Risikoverhalten bei schwer zu erreichenden Personen : ein {\textquotedblleft}peer education approach{\textquotedblright} = Prevention of HIV transmission trhough sexually risky behaviour in near-inaccessible individuals : a peer education approach = Pr{\'e}vention de la transmission du VIH par un comportement sexuel {\`a} risque chez les personnes difficilement accessibles : une approche ax{\'e}e sur l{\textquoteright}{\'e}ducation par les pairs = Prevenzione della trasmissione dell{\textquoteright}HIV dovuta a un comportamento sessuale a rischio tra le persone difficilmente accessibili : un approccio basato sul principio del {\textquotedblleft}peer education approach{\textquotedblright}}  (S. Aids, \& D. Koch, Eds.). Amriswil: MEDIA Projekt, Intervention.

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