This is the ValueSet that contains codes in both CH LAB-Report Codes for eGFR in CKD-EPI (http://fhir.ch/ig/ch-lab-report/ValueSet/observation-code-cdk-epi-2009) and CH LAB-Report Codes for eGFR in CKD-EPI (http://fhir.ch/ig/ch-lab-report/ValueSet/observation-code-cdk-epi-2009).