Dose Escalation Study of Teclistamab, a Humanized BCMA*CD3 Bispecific Antibody, in Participants With Relapsed or Refractory Multiple Myeloma

Inclusion Criteria: * Documented diagnosis of multiple myeloma according to International Myeloma Working Group (IMWG) diagnostic criteria * Measurable multiple myeloma that is relapsed or refractory to established therapies with known clinical benefit in relapsed/refractory multiple myeloma or be intolerant of those established multiple myeloma therapies, and a candidate for Teclistamab treatment in the opinion of the treating physician. Prior lines of therapy must include a proteasome inhibitor, an immunomodulatory drug and anti-CD38 monoclonal antibody in any order during the course of treatment. Participants who could not tolerate a proteasome inhibitor or immunomodulatory drugs and an anti-CD38 monoclonal antibody are allowed * Eastern Cooperative Oncology Group (ECOG) Performance Status score of 0 or 1 * Female participants of childbearing potential must use acceptable method of contraception * Participants must sign an ICF indicating that he or she understands the purpose of and procedures required for the study and is willing to participate in the study. Consent is to be obtained prior to the initiation of any study-related tests or procedures that are not part of standard-of-care for the participant's disease Exclusion Criteria: * Prior treatment with any B cell maturation antigen (BCMA) targeted therapy * Prior antitumor therapy as follows, before the first dose of study drug: Targeted therapy, epigenetic therapy, or treatment with an investigational drug or used…