1. Center of Environmental and Occupational Diseases, Brest Teaching Hospital, Av Foch, 29200 Brest, France
2. ORPHY Laboratory—Occidental Brittany University 1, Av Le Gorgeu, 29200 Brest, France
3. Carsat Bretagne (Regional Agency of Occupational Health), 236, rue de Chateaugiron, 35000 Rennes, France
4. Cardiology Unit, Brest Teaching Hospital, 1 Av T Prigent, 29200 Brest, France