Abstract
References
1.
Drennan
J C
. (1970 ) Develop. Med. Child Neurol. Suppl. 22 p 33 .
2.
Hoppenfeld
S
. (1967 ) J. Bone Jt Surg.
49B , 276 .
3.
Sharrard
W J W
. (1968 ) J. Bone Jt Surg.
50B , 466 .
4.
Sharrard
W J W
. (1971 ) J. Bone Jt Surg , (in press).