Abstract
References
1.
Parkinson
J.
Cookson
H.
(1931 ) Quart. J. Med. , 24 , 499 .
2.
Parkinson
J.
Hoyle
C.
(1934 ) Lancet (ii ), 913 .
3.
Schlesinger
B.
Landtman
B.
(1949 ) Brit. Heart J. , 11 , 102 .
4.
Smithwick
R. H.
(1948 ) Amer. J. Med. , 4 , 744 .