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In the article entitled "Physical Properties of Aerosols Produced by Dermabrasion" that appeared in the December 1989 issue of the Archives (1989;125:1637-1643), there were errors in the equation on page 1642, column 1, the last line. The equation appeared as follows: "S = (2/3) (r2w2Rp)." The equation should have appeared as follows: "S = (2/3) (r2w2Rp)."
Incorrect Equation. Arch Dermatol. 1990;126(4):481. doi:10.1001/archderm.1990.01670280065011