Copeland Billy, Aljitawi Omar, Fitzgerald Steven M, Chi David S, Krishnaswamy Guha
Department of Internal Medicine, East Tennessee State University, Johnson City, Tennessee 37614-1709, USA.
Ann Allergy Asthma Immunol. 2005 Dec;95(6):510-7. doi: 10.1016/S1081-1206(10)61011-3.