1. Christensen N, Sondergaard J, Fisker N, Christesen HT. Infant respiratory tract infections or wheeze and maternal vitamin D in pregnancy: a systematic review. Pediatr Infect Dis J 2017;36:384-91.
2. King D, Mitchell B, Williams CP, Spurling GK. Saline nasal irrigation for acute upper respiratory tract infections. Cochrane Database Syst Rev 2015;(4):CD006821.
4. Harris AM, Hicks LA, Qaseem A, High Value Care Task Force of the American College of Physicians and for the Centers for Disease Control and Prevention. Appropriate antibiotic use for acute respiratory tract infection in adults: advice for high-value care from the American College of Physicians and the Centers for Disease Control and Prevention. Ann Intern Med 2016;164:425-34.
5. Monto AS. Occurrence of respiratory virus: time, place and person. Pediatr Infect Dis J 2004;23(1 Suppl):S58-64.
6. Kaiser L, Lew D, Hirschel B, Auckenthaler R, Morabia A, Heald A, et al. Effects of antibiotic treatment in the subset of common-cold patients who have bacteria in nasopharyngeal secretions. Lancet 1996;347:1507-10.
7. Witek TJ, Ramsey DL, Carr AN, Riker DK. The natural history of community-acquired common colds symptoms assessed over 4-years. Rhinology 2015;53:81-8.
11. Li-Ng M, Aloia JF, Pollack S, Cunha BA, Mikhail M, Yeh J, et al. A randomized controlled trial of vitamin D3 supplementation for the prevention of symptomatic upper respiratory tract infections. Epidemiol Infect 2009;137:1396-404.
14. Holick MF. Vitamin D deficiency. N Engl J Med 2007;357:266-81.
15. Vieth R, Chan PC, MacFarlane GD. Efficacy and safety of vitamin D3 intake exceeding the lowest observed adverse effect level. Am J Clin Nutr 2001;73:288-94.
16. Higgins JP, Green S. Cochrane handbook for systematic reviews of interventions: version 5.1.0 (updated March 2011) [Internet]. London: The Cochrane Collaboration; 2011 [cited 2019 Mar 21]. Available from:
http://handbook.cochrane.org
18. Grant CC, Crane J, Mitchell EA, Sinclair J, Stewart A, Milne T, et al. Vitamin D supplementation during pregnancy and infancy reduces aeroallergen sensitization: a randomized controlled trial. Allergy 2016;71:1325-34.
19. Grant CC, Kaur S, Waymouth E, Mitchell EA, Scragg R, Ekeroma A, et al. Reduced primary care respiratory infection visits following pregnancy and infancy vitamin D supplementation: a randomized controlled trial. Acta Paediatr 2015;104:396-404.
20. Smith E, Wisner E, Sorensen R. Vitamin D supplementation during pregnancy and infancy reduces aeroallergen sensitization: a randomized controlled trial. Pediatrics 2017;140(Suppl_3):S183-4.
21. Hornsby E, Pfeffer PE, Laranjo N, Cruikshank W, Tuzova M, Litonjua AA, et al. Vitamin D supplementation during pregnancy: effect on the neonatal immune system in a randomized controlled trial. J Allergy Clin Immunol 2018;141:269-78.
22. Chawes BL, Bonnelykke K, Stokholm J, Vissing NH, Bjarnadottir E, Schoos AM, et al. Effect of vitamin D3 supplementation during pregnancy on risk of persistent wheeze in the offspring: a randomized clinical trial. JAMA 2016;315:353-61.
25. Cashat-Cruz M, Morales-Aguirre JJ, Mendoza-Azpiri M. Respiratory tract infections in children in developing countries. Semin Pediatr Infect Dis 2005;16:84-92.