Shanghai Ninth People's Hospital, Shanghai, China
The Second Hospital of Tianjin Medical University, Tianjin, China
Peking University People's Hospital, Peking, China
University Children's Hospital, Center for Pediatrics - Department of Cardiology, Belgrade, Serbia
Universitäts-Kinderspital Zürich, Zürich, Switzerland
Medizinische Universität Wien, AKH Wien, Abteilung für Pädiatrische Kardiologie, Vienna, Austria