Abstract

References
1.
Armitage
P
. (1971 ) Statistical Methods in Medical Research . Blackwell Scientific Publications , Oxford
2.
Binnie
W H
. (1976 ) Proceedings of the Royal Society of Medicine
69 , 737
3.
Cox
D R
Lewis
P A W
. (1966 ) The Statistical Analysis of Series of Events . Methuen , London
4.
Lewis
P A W
. (1964 ) Journal of the Royal Statistical Society Series B
26 , 398
5.
Pasternack
B S
Gilbert
H S
. (1971 ) Journal of Chronic Diseases
24 , 701
6.
Seville
R H
. (1976 ) British Journal of Dermatology
95 , 643
7.
Seville
R H
. (1977 ) British Journal of Dermatology
96 , 297
