To the Editor We read with interest the article by Roscher et al on validation of 4 staging systems for cutaneous squamous cell carcinoma published in the April issue of JAMA Dermatology. We believe that such a population-based case-control comparison of staging systems is highly valuable in helping to refine subsequent staging. However, we have some concerns with the report's analysis and conclusions.
https://ift.tt/2PIzZap
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