Al-Othman, Abdulaziz Al-Musharaf, Sara Al-Daghri, Nasser M. and Yakout, Sobhy Alkharfy, Khalid M. Al-Saleh, Yousef Al-Attas, Omar S. Alokail, Majed S. Moharram, Osama Sabico, Shaun and Kumar, Sudhesh Chrousos, George P., Tea and coffee consumption in relation to vitamin D and calcium levels in Saudi adolescents, Nutrition Journal, (11), 2012, BioMed Central Ltd., 1475-2891