Fig. 2: Flow chart of study inclusion.

At T0, 1038 volunteers participated, of whom 521 were reassessed at T1 (50.2%), and 104 were assessed at T2 (10% of the initial sample size). N = 82 participants provided a hair sample. Because of missing questionnaire data, N = 80 participants were included in the final analysis; 72 (90%) were female; mean age was 35.65 years.