Abstract
References
1.
Barrett
N R
(1946 ) Thorax
1 , 48
2.
Barrett
N R
(1947 ) Brit. J. Surg . 35 , 216
3.Lancet (1963 ) i , 816
4.
Sealy
W
(1963 ) Amer. J. Surg . 105 , 505