1. Department of Anesthesiology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
2. The White Mountain Institute, The Sea Ranch, CA, USA
3. Adena Health System, department of anesthesiology, Chillicothe, OH, US
4. Department of family medicine, Skagit Regional Health, Family Medicine, Arlington, WA, USA
5. Department of Internal Medicine, Huntington Hospital, Prasadena, CA, USA
6. David Geffen School of Medicine-UCLA, Charles R, Drew University of Medicine and Science, Los Angeles, CA, USA