Polly E Parsons1, Renee D Stapleton2. 1. Pulmonary and Critical Care Medicine, Department of Medicine, Larner College of Medicine at the University of Vermont, Burlington, VT. Electronic address: polly.parsons@uvmhealth.org. 2. Pulmonary and Critical Care Medicine, Department of Medicine, Larner College of Medicine at the University of Vermont, Burlington, VT.