This is the ValueSet that contains all the codes in Age Stratified Example Age Groups (http://hl7.org/fhir/uv/cqm/ValueSet/age-stratified-example) and Age Stratified Example Age Groups (http://hl7.org/fhir/uv/cqm/ValueSet/age-stratified-example). E.g. what you have to deal with if you get resources containing codes in either of them