APC and cystic fibrosis: In particular, for molecular genetic testing, it offers specific EQA schemes for 4 diseases: Cystic Fibrosis (CFTR gene) (CF), Beta Thalassemia (HBB gene) (BT), Fragile X-Syndrome (FMR1 gene) (FX), and Familial Adenomatous Polyposis Coli (APC gene) (APC) [12].