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Figure 1 Myocardial blood flow at rest (normalized to the rate-pressure product) and during adenosine-induced vasodilation in children with early ASO for simple TGA (group A; n = 15; 9 ± 1 years), children with later ASO for more complex TGA with associated anomalies (group B; n = 7; age 13 ± 3 years) and healthy young adults (n = 10; age 26 ± 6 years).