1.
Circulation
; 48(5): 1157, 1973 Nov.
Article
in English
| MEDLINE
| ID: mdl-4584615
2.
JAMA
; 213(13): 2268-9, 1970 Sep 28.
Article
in English
| MEDLINE
| ID: mdl-5468937
3.
J Chronic Dis
; 21(5): 341-8, 1968 Aug.
Article
in English
| MEDLINE
| ID: mdl-5675418