1. Department of Chemistry, Korea University, Seoul, 136-701, Korea
2. The School of East-West Medical
Science, Kyung Hee University, Yongin,
446-701, Korea
3. Department
of Clinical Laboratory
Science, Wonkwang Health Science University, Iksan, 570-750, Korea
4. Department of Chemistry and
Biochemistry, The University of Texas at Austin, Austin, Texas 78712-0165, United States
5. Department of Chemistry, Yonsei University, 262 Seonsanno Sinchon-dong, Seodaemun-gu,
Seoul 120-749, Korea