TY  - RPRT
TI  - Clinical research 3: sample selection.
AU  - Ruth Endacott
AU  - Mari Botti
PY  - 2005
DO  - 10.1016/j.iccn.2004.11.001
UR  - https://pubmed.ncbi.nlm.nih.gov/15681218/
ID  - 15681218
ER  -