Apnea

• University of Colorado Anschutz Medical Campus — Aurora, Colorado, United States

• Clinique Saint-Luc de Bouge — Bouge, Namur, Belgium

• Hospital de Clinicas de Porto Alegre — Porto Alegre, Rio Grande do Sul, Brazil

Not specified

• Papworth Hospital — Cambridge, United Kingdom

• University of Ottawa Heart Institute — Ottawa, Ontario, Canada

• Medisch Centrum Leeuwarden — Leeuwarden, Provincie Friesland, Netherlands
• University Medical Center Groningen — Groningen, Netherlands
• Martini Ziekenhuis Groningen — Groningen, Netherlands

• Université de Montréal — Montreal, Quebec, Canada

• Universidade Federal de Santa Maria — Santa Maria, Rio Grande do Sul, Brazil

• The James Cook University Hospital — Middlesbrough, Cleveland, United Kingdom