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Table 1 Morning sampling chronology of study participants.

From: Biomonitoring of complex occupational exposures to carcinogens: The case of sewage workers in Paris

*9h00 9h30 10h00-12h00 12h30 13h00 13h30
24h urine collection      
Pre-treatment of 24h urine samples     
  Cup of Coffee     
Medical visit   
Blood sample   
  Isolation and pre-treatment of lymphocytes
  Biological tests (urea, creatinine)
    3h urine collection   
     Pre-treatment of 3h urine samples
    Thanks Departure  
  1. *Friday of each week. In each study week, 16 participants will be sampled (8 exposed in the morning and 8 non-exposed in the corresponding afternoon).