Affiliations: Section of Critical Care Medicine, Department of Pediatrics, Physiology and Biophysics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, USA
Note: [] Address for correspondence: Mark J. Heulitt, Physiology and Biophysics, College of Medicine, University of Arkansas for Medical Sciences, Applied Respiratory Physiology Laboratory Arkansas Children’s Hospital Research Institute, Little Rock, AR 72202-3591, USA. Tel.: +1 501 364 1858; Fax: +1 501 364 3188; E-mail: heulittmarkj@uams.edu.