1.
Aten Primaria
; 31(2): 114-9, 2003 Feb 15.
Article
in Spanish
| MEDLINE
| ID: mdl-12609110
2.
Aten Primaria
; 20(6): 333-7, 1997 Oct 15.
Article
in Spanish
| MEDLINE
| ID: mdl-9424167
3.
Fam Med
; 25(5): 292-3, 1993 May.
Article
in English
| MEDLINE
| ID: mdl-8513993