Tom,

NCI has a very nice discussion of the different kinds of trials on its
gopher.

CLINICAL TRIALS FOR PHYSICIANS

CLINICAL TRIALS FOR PATIENTS

Get to the NCI gopher, then PDQ INFOMATION/OTHER PDQ INFORMATION.

I use these in my classes on research methods for fellows.

These publications are  also available by e-mail and ftp.

Let me know if you have trouble getting them.

Regards,
Bob Bienkowski

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Robert Bienkowski, PhD
Director
Pediatric Research Center
Schneider CHildren's Hospital
Long Island Jewish Medical Center