Abstract

References
1.
Fry
G A
Martin
W J
Dearing
W H
Culp
C E
(1965 ) Mayo Clinic Proceedings
40 , 298 –299 .
2.
Mitchell
R G
(1983 ) In: Oxford Textbook of Medicine . Ed.
Weatherall
D J
Oxford University Press , Oxford ; pp 274 –276 .
3.
Morson
B C
(1961 ) Proceedings of the Royal Society of Medicine
54 , 723 –724 .
4.
Spence
M R
Gupta
P K
Frost
J K
King
T M
(1978 ) American Journal of Obstetrics and Gynecology
131 , 295 –298 .
