TY  - RPRT
TI  - Should study subjects see their previous responses: data from a randomized control trial.
AU  - G H Guyatt
AU  - M Townsend
AU  - J L Keller
AU  - J Singer
PY  - 1989
DO  - 10.1016/0895-4356(89)90105-4
UR  - https://pubmed.ncbi.nlm.nih.gov/2778469/
ID  - 2778469
ER  -