Fig. 2From: Polychlorinated biphenyls and depression: cross-sectional and longitudinal investigation of a dopamine-related Neurochemical path in the German HELPcB surveillance programFlow-chart of the number of the study population. Note: t1Â =Â measurement occasion 1, t2Â =Â measurement occasion 2. 1excluded due to dopamine relevant medication, such as antidepressants or medication in Parkinson diseaseBack to article page