Affiliation: | a Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA b Department of Microbiology, RCTCP, and BK21 BioBC, Chungnam National University, 220 Gungdong, Yuseonggu, Daejon 305-764, Republic of Korea c Department of Microbiology, Yeungnam University College of Medicine, 317-1 Daemyungdong, Namgu, Daegu 705-717, Republic of Korea |