Abstract

References
1.
Thomas
M
Malmcrona
R
Shillingford
J
(1966 ) Brit. Heart J . 28 , 108
2.
Valentine
P A
Fluck
D C
Mounsey
J P D
Reid
D
Shillingford
J P
Steiner
R E
(1966 ) Lancet
ii , 837
3.
Valori
C
Thomas
M
Shillingford
J P
(1967 ) Lancet
i , 127
