1. From Academic Medical Center and Slotervaartziekenhuis, Amsterdam, the Netherlands; Ottawa Hospital Research Institute, Ottawa, Ontario, Canada; Université de Bretagne Occidentale, Brest, France; Hospital of Padua, Padua, Italy; Clinica Universidad de Navarra, Pamplona, Spain; Virgen del Rocio Hospital, Seville, Spain; Karolinska Institutet, Stockholm, Sweden; Warsaw Medical University, Warsaw, Poland; Centre Hospitalo-Universitaire Estaing, Clermont-Ferrand, France;
2. University of Utah, Salt Lake City, Utah; University Hospital Leuven, Leuven, Belgium; and University G. D'Annunzio, Chieti-Pescara, Italy.