Abstract
Get full access to this article
View all access options for this article.
References
1.Index medicus . List of journals indexed . Bethesda, MD : National Library of Medicine , 1989 .
2.Excerpta medica . List of journals abstracted . Amsterdam : Elsevier , 1989 .
3.Science citation index . Philadelphia : Institute for Scientific Information , 1989 .
4.Journal citation reports . Philadelphia : Institute for Scientific Information , 1988 .
5.
Pulido
M
. Carta al director y comunicación corta . Med Clin 1989 ; 93 : 576 –7 .