TY  - RPRT
TI  - The before/after study design in transfusion medicine: methodologic considerations.
AU  - Dean Fergusson
AU  - Paul Hebert
AU  - Stan Shapiro
PY  - 2002
DO  - 10.1053/tmrv.2002.35211
UR  - https://pubmed.ncbi.nlm.nih.gov/12415515/
ID  - 12415515
ER  -