A photo in the article “Tuberculosis testing: Which patients, which test?” (J Fam Pract. 2015;64:553-557,563-565) incorrectly depicted how the induration that arises from a tuberculin skin test should be measured. According to the Centers for Disease Control and Prevention (, the induration should be measured across the forearm, perpendicular to the long axis (elbow to wrist), as indicated by the yellow arrows below.

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