APRT and chronic kidney disease: Conditions not presented due to low numbers are as follows: adenine phosphoribosyltransferase deficiency (n = 9), BK nephropathy (n = 62), CKD due to genetic factors in people of African Ancestry (CKD-AFRICA) (n = 65), calciphylaxis (n = 59), Fabry disease (n = 47), fibromuscular dysplasia (n = 42), mitochondrial renal disease (n = 4), and pure red cell aplasia (n = 7).