© 2008 Elsevier España S.L., y Sociedad Española de Toxicomanías (SET). The manuscript version is made available under the CC BY-NC-ND 4.0 license.
Except where otherwise noted, this item's license is described as © 2008 Elsevier España S.L., y Sociedad Española de Toxicomanías (SET). The manuscript version is made available under the CC BY-NC-ND 4.0 license.