1. A randomized, controlled trial of vitamin A in children with severe measles;N Engl J Med,1990
2. Measles vaccines: WHO position paper;Wkly Epidemiol Rec,2009
3. The clinical significance of measles: a review;J Infect Dis,2004
4. Joint WHO/UNICEF statement on vitamin A for measles;Wkly Epidemiol Rec,1987
5. Long SS eds;Red Book: 2018 report of the committee on infectious diseases,2018