CST3 and chronic kidney disease: Two of the strongest creatinine loci overlapped with eGFRcrecys loci but not with cystatin C loci, including the GATM locus (lead variant rs76825670) on chromosome 15, associated with creatinine levels and CKD [9, 11–13], and the SLC47A1 locus (lead variant rs111653425) on chromosome 17, which has also been associated with both creatinine levels and eGFR, but not cystatin C [8, 24].