1. Infectious Diseases Division, Department of Medicine, Creighton University School of Medicine, Omaha, Nebraska, USA
2. CHI Health Creighton University Medical Center Bergan Mercy, Omaha, Nebraska, USA
3. Department of Medicine, Creighton University School of Medicine, Omaha, Nebraska, USA
4. Pulmonary, Critical Care, and Sleep Medicine Division, Department of Medicine, Creighton University School of Medicine, Omaha, Nebraska, USA