Comment on "The Mechanism of Action of Topical Retinoids for the Treatment of Nonmalignant Photodamage, Part 1" [letter]

We found a recent 2-part series in the January and February 2010 issues of Cosmetic Dermatology® on topical retinoids for the treatment of nonmalignant photodamage to be well written, but wish to respectfully point out a recurring error and omission concerning an available US Food and Drug Administration–approved formulation for use in the mitigation of fine wrinkles.