1 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA; Division of Geriatrics, General Internal Medicine and Palliative Medicine, Department of Medicine, University of Arizona, AZ, USA; Arizona Center on Aging, Department of Medicine, University of Arizona, AZ, USA. Electronic address: ntoosizadeh@email.arizona.edu.
2 Kinesiology Department, University of Maryland, College Park, MD, USA.
3 Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Department of Medicine, University of Arizona, AZ, USA.
4 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA.