Transport Personnel Health Cohort (TRAPHEAC): study protocol TRAPHEAC 10.16909-dataset-59 Metadata Editor Transport Personnel Health Cohort (TRAPHEAC): study protocol TRAPHEAC 10.16909-dataset-59 Irina Guseva Canu Viviane Remy (c) 2025, Unisanté, University Center for Primary Care and Public Health, Lausanne, Switzerland Metadata Editor Federal Office of Environment Irina Guseva Canu Demographic and Health Survey, Special [hh/dhs-sp] Switzerland Administrative records data [adm] Questionnaires, secondary data