Generate-Boost: study protocol for a prospective, multicenter, randomized controlled, double-blinded phase II trial to evaluate efficacy and safety of bortezomib in patients with s... oleh Jonathan Wickel, Ha-Yeun Chung, Stephanie Platzer, Thomas Lehmann, Harald Prüss, Frank Leypoldt, Albrecht Günther, André Scherag, Christian Geis, on behalf of the GENERATE Study Group