1. Computational and Statistical Genomics Branch; National Human Genome Research Institute; National Institutes of Health; Baltimore Maryland United States of America
2. Department of Biochemistry; Faculty of Medicine Siriraj Hospital; Mahidol University; Bangkok Thailand
3. Department of Epidemiology; Johns Hopkins Bloomberg School of Public Health; Johns Hopkins University; Baltimore Maryland United States of America
4. Department of Oral Biology; School of Dental Medicine; University of Pittsburgh; Pittsburgh Pennsylvania United States of America