Abstract

Get full access to this article
View all access options for this article.
References
1.
J. Aspin.
British Medical Journal . 1962 , 1 , 1386 .
2.
2
D.K. Stevenson.
British Medical Journal.
1962 , 1 , 1382 .
3.
W. Edgar.
British Medical Journal.
1964 , 2 , 1565 .
4.
5.
V.H. Springett .
Lancet . 1964 , 1 , 1091 .
6.
