title: Erratum.
abstract: In the article by Kim et al., entitled "The sound of a Buk (Korean traditional drum) attenuates anaphylactic reactions by the activation of estrogen receptor-β" [Int Arch Allergy Immunol 2015;167:242–49, DOI: 10.1159/000439567], there is an error in Materials and Methods. The sample size of animals was larger than 15, therefore the third paragraph should read: Compound 48/80-Induced Systemic Anaphylaxis. Mice were given an intraperitoneal injection of compound 48/80 (6.5 mg/kg). The period used to observe mortality was based on the results of a pretest during which mice died within 30 min of administration. Ketotifen was used as a positive control (1 μg/kg, p.o.). Mortality was monitored for 40 min after injection. Mice were allocated to each group and divided into 5 groups: (1) no treatment, (2) compound 48/80 injection, (3) compound 48/80 injection and treatment with ketotifen, (4) compound 48/80 injection and exposure to Buk music, and (5) compound 48/80 injection and exposure to white noise. Three independent experiments were performed.