Won Suk Choi, Ji Hyeon Baek, Yu Bin Seo, Sae Yoon Kee, Hye Won Jeong, Hee Young Lee, Byung Wook Eun, Eun Ju Choo, Jacob Lee, Young Keun Kim, Joon Young Song, Seong-Heon Wie, Jin Soo Lee, Hee Jin Cheong, Woo Joo Kim, and Transgovernmental Enterprise for Pandemic Influenza in Korea Department of Internal Medicine, Korea University College of Medicine, Seoul; Department of Internal Medicine, Inha ...