Rehabilitation Sciences, University of Texas Medical Branch, Galveston, TX, USA; Metabolism Unit, Shriners Hospitals for Children, Galveston, Texas, USA. Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA; Metabolism Unit, Shriners Hospitals for Children, Galveston, Texas, USA; Institute of Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA. Electronic address: dherndon@UTMB.edu. Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA; Metabolism Unit, Shriners Hospitals for Children, Galveston, Texas, USA. Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA. Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA; Metabolism Unit, Shriners Hospitals for Children, Galveston, Texas, USA; Institute of Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA.