1. Division of Pulmonary and Critical Care Medicine, Penn State Milton S Hershey Medical Center and College of Medicine, Hershey, PA, USA;
2. Department of Internal Medicine, Penn State Milton S Hershey Medical Center and College of Medicine, Hershey, PA, USA;
3. Department of Public Health Sciences, Penn State Milton S Hershey Medical Center and College of Medicine, Hershey, PA, USA;
4. Division of Hematology and Oncology, Penn State Milton S Hershey Medical Center and College of Medicine, Hershey, PA, USA