Study of the Adverse Events and Change in Disease State of Pediatric Participants (and Young Adults Between the Ages of 18-25) With Relapsed/Refractory Aggressive Mature B-cell Neoplasms Receiving Subcutaneous (SC) Injections of Epcoritamab

National Taiwan University Hospital /ID# 242890, Taipei City

Children's Hospital at Westmead /ID# 240091, Westmead

Universitair Ziekenhuis Leuven /ID# 242384, Leuven

Royal Children's Hospital /ID# 240384, Parkville

Perth Children'S Hospital /ID# 240382, Perth

New York Medical College /ID# 239208, Valhalla

Fondazione IRCCS San Gerardo dei Tintori - Ospedale San Gerardo /ID# 245592, Monza

Hospital Infantil Universitario Nino Jesus /ID# 240717, Madrid

Levine Children's Hospital /ID# 242765, Charlotte

CHU Bordeaux - Hopital Pellegrin /ID# 240832, Bordeaux

Koc Universitesi Hastanesi Translasyonel Tıp Arastırma Merkezi /ID# 240026, Istanbul

Universitaetsklinikum Giessen und Marburg /ID# 240787, Marburg

St Jude Children's Research Hospital /ID# 239184, Memphis

CHU de Nantes, Hotel Dieu -HME /ID# 240831, Nantes

Cincinnati Childrens Hospital Medical Center /ID# 239823, Cincinnati

Universitaetsklinikum Muenster /ID# 239970, Münster

Azienda Ospedaliero Universitaria Meyer /ID# 240049, Florence

Hospices Civils de Lyon /ID# 240834, Lyon

Universitaetsklinikum Erlangen /ID# 240861, Erlangen

Lucile Packard Children's Hospital /ID# 240854, Palo Alto

Institut Gustave Roussy /ID# 240966, Villejuif

Rambam Health Care Campus /ID# 240037, Haifa

Schneider Children's Medical Center /ID# 240171, Petah Tikva

The Chaim Sheba Medical Center /ID# 240670, Ramat Gan

Nicklaus Children's Hospital /ID# 241174, Miami

Children's Hospital of Philadelphia - Main /ID# 239294, Philadelphia

University of Texas Southwestern Medical Center /ID# 240892, Dallas

Hospital for Sick Children /ID# 240767, Toronto

CHU Sainte-Justine /ID# 240766, Montreal

Fakultní Nemocnice Brno - Jihlavská /ID# 239956, Brno

Duplicate_Fakultni Nemocnice v Motole /ID# 239957, Prague

Ospedale Pediatrico Bambino Gesù /ID# 240039, Rome

NHO Nagoya Medical Center /ID# 246680, Nagoya

Kyoto University Hospital /ID# 246907, Kyoto

Osaka City General Hospital /ID# 246906, Osaka

National Cancer Center Hospital /ID# 246722, Chuo-ku

National Center for Child Health and Development /ID# 246658, Setagaya-ku

Seoul National University Hospital /ID# 239894, Seoul

Samsung Medical Center /ID# 239895, Seoul

Hospital Sant Joan de Deu /ID# 240719, Esplugues de Llobregat

Hospital Universitario Vall d'Hebron /ID# 240715, Barcelona