AU  - Wittes RE
TI  - THe cost to patients of participating in clinical trials-reply
PT  - JOUR
DP  - 1989
TA  - JAMA
pages = {1151},
VI  - 261
IP  - 8
AID  - 10.1001/jama.1989.03420080064025 [doi]
4100  - http://dx.doi.org/10.1001/jama.1989.03420080064025
SO  - JAMA February 24, 1989 261(8):1151