@article {34, editor = {,}, title = {PURPOSE AND PROCEDURE}, volume = {7}, number = {2}, pages = {34--34}, year = {2002}, doi = {10.1136/ebm.7.2.34}, publisher = {Royal Society of Medicine}, issn = {1356-5524}, URL = {https://ebm.bmj.com/content/7/2/34}, eprint = {https://ebm.bmj.com/content/7/2/34.full.pdf}, journal = {BMJ Evidence-Based Medicine} }