TY  - RPRT
TI  - Randomized discontinuation trials: utility and efficiency.
AU  - J A Kopec
AU  - M Abrahamowicz
AU  - J M Esdaile
PY  - 1993
DO  - 10.1016/0895-4356(93)90163-u
UR  - https://pubmed.ncbi.nlm.nih.gov/8263581/
ID  - 8263581
ER  -