1.
Rev. méd. Panamá
;
7(2): 137-48, 1982.
Article
in Spanish
| LILACS
| ID: lil-9709
2.
Rev. méd. Caja Seguro Soc
;
13(2): 335-47, 1981.
Article
in Spanish
| LILACS
| ID: lil-4256