Morales-Suárez-Varela M M, Bell C M J, Llopis-González A, Salvador-Sanz A, Mora-Llabata V, Tallón-Guerola M, Pérez-Benajas A
Unit of Public Health, Hygiene and Environmental Health, Valencia University, Spain.
Public Health. 2004 Dec;118(8):594-8. doi: 10.1016/j.puhe.2003.12.010.