Abstract

References
1.
Barnard
C
(1965 ) N.Z. med. J . 64 , 50
2.
Fluck
D C
(1966 ) Lancet
ii , 1052
3.
Ionescu
M I
(1967 ) Thorax
22 , 305
4.
Logan
A
Turner
R
(1959 ) Lancet
ii , 874
5.
Melrose
D G
(1964 ) Lancet
ii , 623
6.
Smith
B
(1965 ) Brit. Heart J . 27 , 618
7.
Starr
A
Edwards
M L
(1961 ) Ann. Surg . 154 , 726
8.
Wooler
G H
(1962 ) Thorax
17 , 49
