CURRENT THERAPY OF SECONDARY CNS INVOLVEMENT IN MALIGNANT LYMPHOMA: DATA FROM A MULTICENTER PROSPECTIVE INTERNATIONAL REGISTRY. (June 2017) - Korfel, A.; Schroers, R.; Schlegel, U.; Schmitz, N.; Hofer, S.; Bairey, O.; Schmidt‐Hieber, M.; Le Coutre, P.; Janz, M.; Reimer, P.; Martus, P.