Reading the tuberculin skin tests. Who, when, and how?: Howard TP, Solomon DA. Arch Intern Med 1988; 148:2457-9. Reprint requests: Thomas P. Howard, MD, Department of Internal Medicine, Division of Pulmonary, Critical Care, and Occupational Medicine, University of South Florida College of Medicine, 13000 Bruce B. Downs Blvd. (111C), Tampa, FL 33612