Citation:Greenberg ER, Baron JA, Stukel TA, Stevens MM, Mandel JS, Spencer SK, et al 1990

Citation

Greenberg ER, Baron JA, Stukel TA, Stevens MM, Mandel JS, Spencer SK, et al. A clinical trial of beta carotene to prevent basal-cell and squamous-cell cancers of the skin. The Skin Cancer Prevention Study Group. N Engl J Med 1990 Sep 20;323(12):789-95 Available from: http://www.ncbi.nlm.nih.gov/pubmed/2202901.

Critical appraisals

• Assign a critical appraisal

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1. 2.2 Chemoprevention