1 Division of Allergy and Clinical Immunology, Department of Medicine, W.G. (Bill) Hefner VA Medical Center, Salisbury, North Carolina; Charlotte Health Care Center, Charlotte, North Carolina.
2 Division of Allergy and Clinical Immunology, Department of Medicine, W.G. (Bill) Hefner VA Medical Center, Salisbury, North Carolina; Charlotte Health Care Center, Charlotte, North Carolina; Kernersville Health Care Center, Kernersville, North Carolina; Department of Medicine, Wake Forest School of Medicine and Wake Baptist Hospital, Winston Salem, North Carolina. Electronic address: gkrishna@wakehealth.edu.