Evidence based medicine article, posted to medlib today by Tanya Feddern:
Oosterhuis WP, Bruns DE, Watine J, Sandberg S, Horvath AR. Evidence-based guidelines in laboratory medicine: Principles and methods. Clinical Chemistry, 2004 May; 50(5):806-818.
[ http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=PureSearch&db=pubmed&details_term=15105349%5BUID%5D ] You can also just type in the PMID number in the PubMed search box to retrieve the citation: 15105349