1. Institute for Environmental Medicine and Department of Physiology University of Pennsylvania Perelman School of Medicine Philadelphia PA
2. Department of Physiology Pennsylvania Muscle Institute University of Pennsylvania School of Medicine Philadelphia PA
3. Division of Thoracic Surgery University Hospital Zurich Zurich Switzerland
4. Department of Surgery SUNY Upstate Medical University Syracuse NY
5. Cardiovascular Surgery Division University of Pennsylvania Perelman School of Medicine Philadelphia PA
6. Surgical Critical Care University of Maryland Medical Center Baltimore MD
7. Pulmonary Allergy and Critical Care Division University of Pennsylvania Perelman School of Medicine Philadelphia PA