Face value: sunscreen, lack of control group, and conflict-of-interest

A reader pointed out a 2016 paper published in Dermatologic Surgery.

Daily Use of a Facial Broad Spectrum Sunscreen Over One-Year Significantly Improves Clinical Evaluation of Photoaging – M. Randhawa et al. – Dermatologic Surgery: December 2016 – doi: 10.1097/DSS.0000000000000879

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