1. Department of Microbiology, Immunology Programme, Life Science Institute, Yoon Loo Lin School of Medicine, National University of Singapore, Singapore
2. Singapore Immunology Network, BMSI, A-STAR, Singapore
3. Department of Clinical Research, Singapore General Hospital, Singapore
4. Department of Occupational and Environmental Health, Nagoya University Graduate School of Medicine, Nagoya, Japan
5. Present address: Institut de Recherches Internationales Servier, Suresnes Cedex, France