Division of Pulmonary, Critical Care, Hyperbaric, Allergy, and Sleep Medicine, Loma Linda University, Loma Linda, CA, USA. Department of Emergency Medicine, Loma Linda University, Loma Linda, CA, USA. School of Medicine, California University of Science and Medicine, San Bernardino, CA, USA. Division of Nephrology, Loma Linda University, Loma Linda, CA, USA. School of Medicine, Loma Linda University, Loma Linda, CA, USA.