Courses: PH251C Causal Inference and Meta-analysis PH254 Occupational and Environmental Epidemiology UCSF GHS206 Epidemiology Research Interests: Arsenic in drinking water Perchlorate and thyroid hormones Meta-analysis Current Projects: Major projects include a lung cancer case-control study of arsenic in water in California and Nevada, a cancer case-control study of arsenic in drinking water in Chile, a cross-sectional study of arsenic and lung function in Chile, and a cross-sectional study of perchlorate and other thyroid inhibitors in pregnant women and newborns in California.