Results A total of 34 patients (15 boys, 19 girls; mean age, months; range, - months) were randomized to receive either propranolol or steroid treatment (17 in each treatment group). Guardians for 2 patients in the steroid group withdrew their consent, and 1 patient in the propranolol group did not complete the efficacy test. The intention-to-treat analysis, applying multiple imputations, found the treatment response rate in the propranolol group to be %, and that of the steroid group was %. Because the difference in response rate between the groups was %, propranolol was considered noninferior. We found that there was no difference between the groups in safety outcomes.