Department of Internal Medicine, Ewha Womans University School of Medicine, Seoul, Korea Correspondence
to: Seong-Eun Kim, Department of Internal Medicine, Ewha Womans University School of Medicine, 1071 Anyangcheon-ro, Yangcheon-gu, Seoul 07985, Korea, Tel: +82-2-2650-2845, Fax: +82-2-2655-5762, E-mail: email@example.com
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