References
There are many books and training courses available on the subject of clinical trials. The following are recommended as good general introductions.
'Clinical Trials: A Practical Approach' by Stuart Pocock. Pub. Wiley, 1983
'Data Management and Clinical Trials: EORTC Study Group on Data Management' Ed. N. Rotmensz (now out of print)
'Cancer Clinical Trials: Method and Practice'. Ed. M.E. Buyse, M.J. Staquet and R.J. Sylvester. Pub. Oxford Medical Publications.