Finally, we found no evidence for changing anatomy–behavior correlations in the group of children who were not enrolled in the intervention (AF: MD: F(3,41) = 0.75, p = 0.53, FA: F(3,41) = 0.12, p = 0.95; ILF: MD: F(3,41) = 1.36, p = 0.27, FA: F(3,41) = 1.70, p = 0.18; CC: MD: F(3,41) = 0.55, p = 0.65, FA: F(3,41) = 0.97, p = 0.42). The gene discussed is FOXK2; the disease is atrial fibrillation.