Greco FA, Oien K, Erlander M, Osborne R, Varadhachary G, Bridgewater J, et al. Cancer of unknown primary: progress in the search for improved and rapid diagnosis leading toward superior patient outcomes. Ann Oncol 2012 Feb;23(2):298-304 Abstract available at http://www.ncbi.nlm.nih.gov/pubmed/21709138.
Compare quality appraisals for each clinical question
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