A Study to Investigate the Safety and Effectiveness of a Coagulation Factor IX Gene Insertion Therapy (REGV131-LNP1265) in Pediatric, Adolescent and Adult Participants With Hemophilia B

Orthopaedic Hemophilia Treatment Center, Los Angeles, California, United States

David Geffen School of Medicine at UCLA, Los Angeles, California, United States

Children's Hospital Los Angeles, Los Angeles, California, United States

University of California Davis, Sacramento, California, United States

University California San Francisco, San Francisco, California, United States

University of Colorado Hemophilia and Thrombosis Center, Aurora, Colorado, United States

Yale HTC, New Haven, Connecticut, United States

University of Florida, Gainesville, Florida, United States

Indiana Hemophilia and Thrombosis Center, Indianapolis, Indiana, United States

Tulane University School of Medicine, Louisiana Center for Bleeding and Clotting Disorders, New Orleans, Louisiana, United States

University of Michigan, Ann Arbor, Michigan, United States

Nationwide Children's Hospital, Columbus, Ohio, United States

Children's Hospital of Philadelphia (CHOP), Philadelphia, Pennsylvania, United States

Vanderbilt University Medical Center, Nashville, Tennessee, United States

Royal Prince Alfred Hospital, Haemophilia Treatment Centre, Camperdown, New South Wales, Australia

Royal Brisbane and Women's Hospital, Herston, Queensland, Australia

Royal Adelaide Hospital, Adelaide, South Australia, Australia

University of Alberta Hospital, Edmonton, Alberta, Canada

McMaster University Medical Centre - Hamilton Health Sciences, Hamilton, Ontario, Canada

McGill University Health Center (MUHC), Montreal, Quebec, Canada

Hospices Civils de Lyon, Bron, Lyon, France

Hemostase Clinique, Institut Coeur Poumon, Lille, Nord, France

Hopital Necker, Paris, Île-de-France Region, France

University Hospital Frankfurt, Frankfurt am Main, Hesse, Germany

University Hospital Hamburg Eppendorf, Hamburg, Germany

Careggi University Hospital, Florence, Firenze, Italy

Fondazione Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ca Granda Ospedale Maggiore Policlinico, Milan, Lombardy, Italy

Irccs Humanitas Research Hospital, Rozzano, Lombardy, Italy

Ospedale san Bortolo, Vicenza, Italy

Hospital Universitario Virgen del Rocio, Seville, Andalusia, Spain

Complejo Hospitalario Universitario de A Coruña (Edificio Teresa Herrera-Materno Infantil), A Coruña, Galicia, Spain

Hospital Clinico Universitario Virgen De La Arrixaca, El Palmar, Murcia, Spain

Hospital Universitario Central de Asturias, Oviedo, Principality of Asturias, Spain

Hospital Universitario Vall d'Hebron, Barcelona, Spain

Hospital Universitario La Paz, Madrid, Spain

Haemostasis and Thrombosis Unit, Hospital La Fe, Valencia, Spain

Hospital Universitario Miguel Servet, Zaragoza, Spain

Glasgow Royal Infirmary - Clinical Research Facility, Glasgow, Scotland, United Kingdom

Queen Elizabeth Hospital Birmingham, Birmingham, West Midlands, United Kingdom

Addenbrooke's Hospital, Cambridge University Hospitals NHS FT, Cambridge, United Kingdom

Pathology and Pharmacy Building, The Royal London Hospital, London, United Kingdom

Royal Free London NHS Foundation Trust, London, United Kingdom

St. Thomas' Hospital, London, United Kingdom

Hammersmith Hospital Comprehensive Care Centre, London, United Kingdom