![Zinc combined with vitamin A reduces upper respiratory tract infection morbidity in a randomised trial in preschool children in Indonesia]()
Zinc combined with vitamin A reduces upper respiratory tract infection morbidity in a randomised trial in preschool children in IndonesiaKartasurya, Martha I.; Ahmed, Faruk; Subagio, Hertanto W.; Rahfiludin, Muhammad Z.; Marks, Geoffrey C. · British Journal of Nutrition · 2012