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While I think this is definitely a distinct kind of medical research study, Cost-benefit analysis deals mostly with the economic aspects outside of medical context. As such, i think this page should link to a page that is devoted to Cost benefit analysis in medicine.
"Study design" was renamed to "Clinical study design", but I have temporarily un-wikilinked this so as to be able to find out what articles link to that article. It seems to take about a week for wikipedia's catalogues to catch up with changes to templates, and use in templates affects the "what link's here" tool. So the wikilink can be restored after that. Melcombe (talk) 15:10, 7 July 2010 (UTC)