Abstract

References
1.
Beighton
P
. (1968 ) Postgrad. med. J.
44 , 426 .
2.
Kinsella
R A
Back
D K
. (1968 ) Med. Clin. N. Amer.
52 , 393 .
3.
Thomas
H M
. (1933 ) Arch. int. Med.
51 , 511 .
