Temple University School of Medicine, Philadelphia, Pennsylvania, United States
University Hospital of Ioannina, Ioannina, Greece
University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, United States
Kingston General Hospital, Kingston, Ontario, Canada
Afdeling longziekten, Winschoten, Netherlands
Twenteborg Ziekenhuis, Almelo, Netherlands
Amphia Ziekenhuis, Breda, Netherlands
Universitätsklinik des Saarlandes, Homburg/Saar, Germany
Ospedale degli Infermi di Biella, Biella, Italy
Ospedale Civile, Piacenza, Italy
Spedali Civili di Brescia, Brescia, Italy
Chung-ang University Hospital, Seoul, Korea, Republic of
Kangnam St. Mary's Hospital, Seoul, Korea, Republic of
Jeonnam National University Hospital, Kwangju, Korea, Republic of
Clinique Saint Sauveur, Angers, France
Hôpital Tenon, Paris cedex 20, France
Hôpital Charles Nicolle, Rouen cedex, France
Bosch Medicentrum, Den Bosch, Netherlands
Hjertelaget Research Foundation, Stavanger, Norway
Medical Dept. B0642, Hillerød, Denmark
Coatbridge Health Centre, Coatbridge, United Kingdom
St Chads Surgery, Radstock, United Kingdom
Foresterhill Healthcentre, Aberdeen, United Kingdom