Abstract

References
1.
Davies
D
. (1972 ) Quarterly Journal of Medicine
41 , 395
2.
Hamilton
K A
. (1949 ) Annals of Internal Medicine
31 , 216
3.
Hart
F D
Emerson
P
Gregg
I
. (1963 ) Annals of of the Rheumatic Diseases
22 , 11
4.
Wilkinson
M
Bywaters
E G L
. (1958 ) Annals of the Rheumatic Diseases
17 , 209
5.
Zorab
P A
. (1962 ) Quarterly Journal of Medicine
31 , 267
