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Colorectal Cancer free resource MedlinePlus Health Information https://medlineplus.gov/colorectalcancer.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=29917119.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/29917119/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/29917119
Full text from free resource Diposit Digital de la Universitat de Barcelona http://hdl.handle.net/2445/171985
free resource scite Smart Citations https://scite.ai/reports/29917119
subscription/membership/fee required Silverchair Information Systems https://academic.oup.com/jnci/article-lookup/doi/10.1093/jnci/djy099