Idiomas:
| Document | Description |
|---|---|
 Nivel 1 | Un breve resumen elaborado por GreenFacts a partir del documento fuente siguiente (4 páginas, 0.2 MB) |
| Nivel 3 - El documento fuente publicados en 2003 y 2004 por la Organización Mundial de la Salud (OMS) : | |
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