1. Department of Sports Medicine, Pepperdine University, Malibu, CA, USA
2. Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, and Gregory Fleming James Cystic Fibrosis Research Center, University of Alabama at Birmingham, Birmingham, AL, USA
3. Department of Kinesiology, School of Public Health-Bloomington, Indiana University, Bloomington, IN, USA