@article {2, editor = {,}, title = {Purpose and procedure}, volume = {9}, number = {1}, pages = {2--2}, year = {2004}, doi = {10.1136/ebm.9.1.2}, publisher = {Royal Society of Medicine}, issn = {1356-5524}, URL = {https://ebm.bmj.com/content/9/1/2}, eprint = {https://ebm.bmj.com/content/9/1/2.full.pdf}, journal = {BMJ Evidence-Based Medicine} }