Calculation of direct antiretroviral treatment costs and potential cost savings by using generics in the German HIV ClinSurv cohort. oleh Matthias Stoll, Christian Kollan, Frank Bergmann, Johannes Bogner, Gerd Faetkenheuer, Carlos Fritzsche, Kirsten Hoeper, Heinz-August Horst, Jan van Lunzen, Andreas Plettenberg, Stefan Reuter, Jürgen Rockstroh, Hans-Jürgen Stellbrink, Osamah Hamouda, Barbara Bartmeyer, ClinSurv Study Group