1 Division of Pulmonary, Critical Care, Allergy & Sleep Medicine, Medical University of South Carolina, Charleston, SC.
2 American College of Radiology, Reston, VA.
3 Department of Radiology, Duke University., Durham, NC.
4 Division of Pulmonary, Critical Care, Allergy & Sleep Medicine, Medical University of South Carolina, Charleston, SC; Health Equity and Rural Outreach Innovation Center, Ralph H. Johnson VA Healthcare System, Charleston, SC. Electronic address: [email protected].