OT04 MCL‐R2 ELDERLY: A PHASE III STUDY OF THE EUROPEAN MCL NETWORK ASSESSING EFFICACY OF ALTERNATING IMMUNOCHEMOTHERAPY (R‐CHOP / R‐HAD) ANDARITUXIMAB‐LENALIDOMIDE MAINTENANCE V. Ribrag* | P. Feugier | J. Doorduijn | M. Delfau‐Larue | O. Hermine | H. Kluin‐Nelemans | M. Dasilva | A. Lopez‐Hernandez | J. Walewski | M. Szymczyk | C. Pott | C. Homburg | V. Van der Velden | P. Gameiro | R. Garcia‐Sanz | M. Ladetto | H. van Krieken | J. Cabeçadas | G. Rymkiewicz | W. Klapper | E. Hoster | S. Le Gouill | M. Dreyling Hematology, Gustave Roussy Cancer Campus, Villejuif, France; Hematology, Hôpitaux De Brabois, Vandoeuvre‐Les‐Nancy, France; Hematology, Department of Hematology, Erasmus MC, Rotterdam, Netherlands; Hématologie et Immunologie Biologiques, GH Henri Mondor, Creteil, France; Hematology, Groupe Hospitalier : Hôpital Universitaire Necker‐Enfants Malades, Paris, France; Department of Hematology, University Medical Center Groningen, University of Groningen, Groningen, Netherlands; Serviço De Hematologia, Instituto Português De Oncologia De Lisboa, Lisbon, Portugal; Hematology, Hospital Universitari Vall d'Hebron, Barcelona, Spain; Lymphoid Malignancy, Maria Sklodowska‐Curie Institute ‐ Oncology Center, Warszawa, Poland; Klinisch‐Experimentelle Hämatologie, Universitätsklinikum Schleswig‐Holstein, Kiel, Germany; Laboratoriumhoofd Immunocytologie, Sanquin Diagnostiek, Amsterdam, Netherlands; Biologia Molecular Laboratório De Hemato‐ Oncologia, Instituto Português De Oncologia De Lisboa, Lisbon, Portugal; Hematology, Universita De Salamanca, Salamanca, Spain; Hematology, Azienda Ospedaliera Nazionale SS.Antonio e Biagio e C. Arrigo, Alessandria, Italy; Pathology, Radboud University Medical Center, Nijmegen, Netherlands; Serviço De Anatomia Patológica, Instituto Português De Oncologia De Lisboa, Lisbon, Portugal; 17 Institut Für Pathologie, Sektion Hämatopathologie und Lymphknotenregister, Universitätsklinikum Schleswig‐Holstein, Campus Kiel, Kiel, Germany; Department of Medicine III, University Hospital of Munich, Munich, Germany; Service d'Hématologie, CHU de Nantes, Nantes, France