| web | https://www.ncbi.nlm.nih.gov/pubmed/12594192 |
| author | Villanueva CM, Fernandez F |
| publication | J Epidemiol Community Health |
| date | 2003-03-01 |
| web | Villanueva CM, Fernandez F | J Epidemiol Community Health | 2003-03-01 |
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