A Study to Learn About the Study Medicine (Elranatamab) in Participants With Multiple Myeloma That Has Come Back After Responding to Treatment or Has Not Responded to Treatment

National Taiwan University Hospital, Taipei

Memorial Sloan Kettering Cancer Center - David H. Koch Center for Cancer Care (74th Street)., New York

Memorial Sloan Kettering Cancer Center, New York

MSK Westchester, Harrison

Memorial Sloan Kettering Cancer Center - Investigational Drug Service Pharmacy, Long Island City

Taipei Veterans General Hospital, Taipei

MSK Nassau, Uniondale

MSK Commack, Commack

Fox Chase Cancer Center, Philadelphia

UF Health Shands Cancer Hospital, Gainesville

UF Health Shands Hospital Pharmacy Investigational Drug Service - Main, Gainesville

UF Health Shands Hospital, Gainesville

University of Florida, Gainesville

China Medical University Hospital, Taichung

Cleveland Clinic Taussig Cancer Institute, Cleveland

The Regents of the University of Michigan, Ann Arbor

University of Michigan, Ann Arbor

Henry Ford Hospital, Detroit

East Jefferson General Hospital Bone Marrow Transplant Clinic, Metairie

East Jefferson General Hospital, Metairie

Tulane University, New Orleans

Blood Cancer and Stem Cell Transplant Clinic, San Antonio

Methodist Healthcare System of San Antonio dba Methodist Hospital, San Antonio

Methodist Hospital Investigational Pharmacy, San Antonio

Methodist Plaza Clinical Trials Office, San Antonio

St. David's South Austin Medical Center, Austin

Texas Oncology - South Austin, Austin

Poudre Valley Hospital, Fort Collins

Cancer Care & Hematology - Fort Collins, Fort Collins

Poudre Valley Health System (PVHS), Fort Collins

UCHealth Cancer Care & Hematology - Loveland, Loveland

UCHealth Cancer Care & Hematology - Greeley, Greeley

Huntsman Cancer Institute, University of Utah, Salt Lake City

University of Utah, Salt Lake City

Mayo Clinic Hospital, Phoenix

Mayo Clinic, Scottsdale

MSK Basking Ridge, Basking Ridge

MSK Monmouth, Middletown

MSK Bergen, Montvale

Nagoya City University Hospital, Nagoya

Kobe City Medical Center General Hospital, Kobe

National Cancer Center Hospital, Chuo-ku

Japanese Red Cross Medical Center, Shibuya-ku

University Hospital,Kyoto Prefectural University of Medicine, Kyoto

University Hospitals Birmingham NHS Foundation Trust, Birmingham

University College London Hospitals NHS Foundation Trust, London

Guy's and St Thomas' NHS Foundation Trust, London

King's College Hospital NHS Foundation Trust, London

The Royal Marsden NHS Foundation Trust, London

University College London Hospitals NHS Foundation Trust NIHR, London

The Royal Marsden NHS Foundation Trust, Surrey