How do I reference an article from the online version of the ICD-11 in Harvard style?

World Health Organization (2023) 6B40 Post traumatic stress disorder. Available at: https://icd.who.int/browse11/l-m/en#/http://id.who.int/icd/entity/2070699808 (Accessed: Day Month Year)

Remember to include the article number as part of the title. The year of publication is the version date on the webpage.