1 Department of Health Sciences, Faculty of Health and Behavioural Sciences, Lakehead University, Thunder Bay, ON, Canada; Division of Medical Sciences, Northern Ontario School of Medicine, Thunder Bay, ON, Canada.
2 Division of Respiratory Medicine, Department of Pediatrics, and Program in Physiology and Experimental Medicine, SickKids Research Institute, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada. Electronic address: hartmut.grasemann@sickkids.ca.