@misc{indiciae6a99856daf40, title = {Clinical research 3: sample selection.}, author = {Ruth Endacott and Mari Botti}, year = {2005}, doi = {10.1016/j.iccn.2004.11.001}, url = {https://pubmed.ncbi.nlm.nih.gov/15681218/}, note = {Source identifier: 15681218} }