Secondary Objectives: (I) To adjust the terms and links for allergic diseases and hypersensitivity and thus continue the on-line implementation process of ICD-11 based on the lessons learned on the main objective; (II) To estimate the economic impact of ICD-10 and ICD-11 transition for health care facilities; (III) To electronically align ICD-10 codes (and CM adaptation in the USA) with ICD-11.