1. Safety of vitamin A;Bendlich;Am J Clin Nutr,1989
2. Complementary medicine and vitamin A toxicity in children;Coghlan;Med J Aust,2001
3. Hypercalciemie doorchronisch vitamine-a-gebruik bij een bejaardepatiente met nierinsufficientie;Beijer;Ned Tijdschr Geneeskd,2001
4. The safe use of vitamin A: a report of the International Vitamin A Consultative Group;Bauernfeind,1980
5. Treatment of newly diagnosed and relapsed acute promyelocytic leukemia with intravenous liposomal all-trans retinoic acid;Douer;Blood,2001