1. School of Biological Sciences & Institute of Bioinformatics (BIOMAX), Seoul National University, Seoul 151-742, Korea.
2. Chunlab Inc., Seoul National University, Seoul 151-742, Korea.
3. Department of Environmental Health, Korea University, Seoul 136-703, Korea.
4. Department of Public Health Sciences, Graduate School, Korea University, Seoul 136-703, Korea.
5. Korea University Guro Hospital, Korea University College of Medicine, Seoul 136-703, Korea.