Editorial

Strike PW Statistical methods in laboratory medicine Oxford: Butterworth-Heinemann, 1991.

Streiner DL , Norman GR Health measurement scales: a practical guide to their development and use Oxford: Oxford University Press , 1989.

Hill AB , Hill ID Bradford-Hill's principles of medical statistics 12th edition. London: Edward Arnold, 1991.

Armitage P. , Berry G. Statistical methods in medical research Second edition. Oxford: Blackwell, 1987.

Colton T. Statistics in medicine Boston: Little Brown, 1974.

Altman DG Practical statistics of medical research London: Chapman and Hall, 1991.

Bland M. An introduction to medical statistics Oxford: Oxford University Press, 1987.

Fleiss JL The design and analysis of clinical experiments New York : Wiley, 1986.

Everitt BS Statistical methods for medical investigations. London: Edward Arnold, 1989.