Text and Data Mining valid from 2018-11-20
Received: 22 August 2018
Accepted: 19 October 2018
First Online: 20 November 2018
Ethics approval and consent to participate
: All employers and employees (<i>n</i> = 1103) have signed a written informed consent. The program obtained the approval of the security and health committees of all company worksites and agreed and signed with the worksite unions, and the program is included in the collective bargaining agreement. The program design has approved and obtained a certificate of ethical approval from the Security and Health Committee of FCC S.A. and the Catalan public administration (Subdirección General de Drogodependencias de la Agència de Salut Pública de Catalunya del Departamento de Salud, Servicios Territoriales de Tarragona del Departamento de Trabajo). The clinical information was strictly confidential, following the organic law 17/1999, of 13 December about personal data protection L.O.P.D. All of reference data for detection controls are collected in the medical service of the FCC S.A. Delegation.
: Not applicable.
: The authors declare that they have no competing interests.
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