*Corresponding author: Juan G ó mez-Salgado, Healthcare District Huelva Costa, Condado-Campi ñ a, Andalusian Health Service, Ronda de Legionarios 8, 21700 La Palma del Condado, Huelva, Spain, Phone: + 34 671 597145, Fax: + 34 959027020, E-mail: [email protected] ; and Department of Nursing, Department of Environmental Biology and Public Health, University of Huelva, Spain Adolfo Romero, Andr é...