FOXK2 and atrial fibrillation: Post hoc multiple comparisons (Dunn’s tests) revealed that Kruskal-Wallis results are ascribable to a significant VPI difference: between FAT and all ventral and non-frontal tracts; between AF and SLF-tp, AF and UF, AF and ILF; between SLF-II and UF, SLF-II and ILF.