Corresponding author: Jeong-Man Kim, M.D. Department of Laboratory Medicine, Dong-A University College of Medicine, Dongdaesindong 3-ga, Seo-gu, Busan 602-714, Korea Tel: +82-51-240-5322, Fax: +82-51-255-9366 E-mail: jmkim@dau.ac.kr
∗ This paper was supported by the Dong-A University Research Fund in 2007.
Revised 8 July 200910 September 2009 Accepted 12 December 2009
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