Abstract

References
1.
Cohen
H
, (1947 ) Proceedings of the Royal Society of Medicine
40 , 443 –452
2.
Davies
H W
, (1927 ) Proceedings of the Royal Society of Medicine
21 , 583 –588
3.
Fox
R F
, (1910 ) Proceedings of the Royal Society of Medicine
4 , (Balneological & Climatological Section) 63 –80
4.
Howitt
F D
, (1952 ) Proceedings of the Royal Society of Medicine
45 , 548 –554
5.
McSwiney
B A
, (1934 ) Proceedings of the Royal Society of Medicine
27 , 839 –848
