Letters
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Pan American Health Organization
|
| Series: | Revista Panamericana de Salud Pública |
| Online Access: | http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892008001000011&lng=en&tlng=en |