“…No patient experienced a DLT during the first cycle, i.e., the minimum of 9 patients was needed to determine that whether 560 mg daily is the RP2D of ibrutinib in combination with bortezomib. 13 Most frequent adverse events (AE) of the combination treatment were thrombocytopenia (9 patients), peripheral polyneuropathy (PNP), fatigue and anaemia (6 patients each), diarrhea and injection site reaction (5 patients each). The majority of AEs were graded G1 and G2.…”