Institution: | (1) Universidad Simón Bolívar Apdo, 89000 Caracas, Venezuela;(2) University of Birmingham, Birmingham B15 2TT, U.K.;(3) Medicina del Trabajo - IVSS, Caracas, Venezuela;(4) Duncan Manufacturing Company, Guarenas, Venezuela;(5) WMPHO, Birmingham Research Park, Vincent Drive, Birmingham, B15 2SQ, U.K. |