This is the ValueSet that contains all the codes in AllergyIntoleranceSubstanceExposureRisk (http://terminology.hl7.org/ValueSet/allerg-intol-substance-exp-risk) and AllergyIntoleranceSubstanceExposureRisk (http://terminology.hl7.org/ValueSet/allerg-intol-substance-exp-risk). E.g. what you have to deal with if you get resources containing codes in either of them