Effects of vitamin D supplementation to children diagnosed with pneumonia in Kabul: a randomised controlled trial.
['Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data.', 'Effects of vitamin D supplementation to children diagnosed with pneumonia in Kabul: a randomised controlled trial.', 'Iwona Stelmach', 'The BMJ', 'Creative Commons Attribution', 'Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data.']