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References
1.
Dixon
A. St.J.
and
Franklin
A.
(1968 ). Brit. med. J. 3 , 728 .
2.
Godfrey
C. M.
(1968 ). J. Can. Physio. Assoc. 20 , 352 –354 .
3.
Haslock
D. I.
and
Wright
V.
(1970 ). Ann. phys. Med. 10 , 236 –240 .