This is the ValueSet that contains codes in both x_AdverseEventCausalityAssessmentMethods (http://terminology.hl7.org/ValueSet/v3-xAdverseEventCausalityAssessmentMethods) and x_AdverseEventCausalityAssessmentMethods (http://terminology.hl7.org/ValueSet/v3-xAdverseEventCausalityAssessmentMethods).