In the article "Cyclacillin Versus Amoxicillin as Treatment for Acute Otitis Media" by McLinn and Serlin (Pediatrics 1983;71:196-199), there is an error under "Materials and Methods." The first sentence should read as follows: The study included 240 outpatients (150 from Pennsylvania, 90 from Arizona), between 2 months and 11 years of age, with the diagnosis of acute suppurative otitis media. In addition, in Table 2, the age range for both groups [211 patients] should read as follows: 2 mo to 9 yr.