Figure 1From: A prospective cohort study of stroke mortality and arsenic in drinking water in Bangladeshi adults Study flow chart. The cohort comprised all inhabitants in Matlab, Bangladesh, age≥18 years on January 1, 2003, living in the study area for at least 3 years (reducing loss-to-follow-up); and primary users of the tested well, with follow-up to death or December 31, 2010 (closed cohort).Back to article page