Evaluation of six months sputum culture conversion as a surrogate endpoint in a multidrug resistant-tuberculosis trial. oleh Paul Meyvisch, Chrispin Kambili, Koen Andries, Nacer Lounis, Myriam Theeuwes, Brian Dannemann, An Vandebosch, Wim Van der Elst, Geert Molenberghs, Ariel Alonso