1. Intensive Care Unit, Tripler Army Medical Center, Honolulu, HI 96859, USA
2. Vascular Surgery Department, Brooke Army Medical Center, Fort Sam Houston, TX 78234, USA
3. Radiology Department, Carl R. Darnall Army Medical Center, Fort Hood, TX 76544, USA
4. Internal Medicine Department, Asprirus Health Plan, Wausau, WI 54401, USA
5. Gastroenterology Department, Landstuhl Regional Medical Center, Landstuhl, GE 66849, USA
6. Emergency Department, Carl R. Darnall Army Medical Center, Fort Hood, TX 76544, USA