aDivision of Antimicrobial Resistance, Korea National Institute of Health, Osong, Korea
bDepartment of Laboratory Medicine, Ewha Womans University School of Medicine, Seoul, Korea
cDepartment of Internal Medicine, Daejeon St. Mary’s Hospital, Daejeon, Korea
© 2014 Published by Elsevier B.V. on behalf of Korea Centers for Disease Control and Prevention.