COL6A3 and muscular dystrophy: Multiple genes with high loading in LF1 relate to muscular dystrophy with the Dmd gene ranking in top 100 genes, and all 3 Col6a genes (Col6a1, Col6a2 and Col6a3 genes) responsible for Ulrich muscular dystrophy are present in the top 40 genes in LF1 (S5 Fig).