TY  - RPRT
TI  - Changing practice: by choice rather than chance.
AU  - S F Pierce
AU  - D Thompson
PY  - 1976
DO  - 10.1097/00005110-197602000-00011
UR  - https://pubmed.ncbi.nlm.nih.gov/812965/
ID  - 812965
ER  -