Infection & Chemotherapy http://dx.doi.org/10.3947/ic.2016.48.2.75 Infect Chemother 2016;48(2):75-80 ISSN 2093-2340 (Print) · ISSN 2092-6448 (Online) Received: June 23, 2016 Corresponding Author : Tae Hyong Kim, MD, PhD Division of Infectious Diseases, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Soonchunhyang University College of Medicine, 59 Dae- sagwan-ro, Yongsan-gu, Seoul 04401, Korea Tel: +82-2-709-9194, Fax: +82-2-709-9083 E-mail: