Al-Othman, Abdulaziz Al-Musharaf, Sara Al-Daghri, Nasser M. and Krishnaswamy, Soundararajan Yusuf, Deqa S. Alkharfy, Khalid M. and Al-Saleh, Yousef Al-Attas, Omar S. Alokail, Majed S. and Moharram, Osama Sabico, Shaun Chrousos, George P., Effect of physical activity and sun exposure on vitamin D status of Saudi children and adolescents, BMC Pediatrics, (12), 2012, BioMed Central Ltd., 1471-2431