High-dose chemotherapy followed by allogeneic stem cell transplantation in high-risk relapsed and refractory aggressive non-Hodgkin lymphoma: Results of a prospective study of the German high-grade non-Hodgkin lymphoma study group. - Bertram Glass; Justin Hasenkamp; Gerald Wulf; Peter Dreger; Michael Pfreundschuh; Martin Gramatzki; Gerda Silling; Christian Wilhelm; Matthias Zeis; Sebastian Pfeiffer; Lorenz Trümper; Norbert Schmitz (Journal of Clinical Oncology, 2012)