Patients (A) 1010, (B) 1024, (C) 1053, and (D) 1072 with suspected IH were photographed and blood was drawn before the initiation of oral propranolol therapy, after 1 month of propranolol, and after 6 months of propranolol. The y axis represents relative miRNA compared with the pooled average of all C19MC miRNAs tested. RNA extracted from plasma was analyzed by qRT-PCR for representative miRNA sequences. Each bar/data point represents one individual patient sample.