Berry, D.; Hesketh, K.; Power, C.& Hyppönen, E. 2011. Vitamin D status has a linear association with seasonal infections and lung function in British adults. British Journal of Nutrition. Vol 106 No 9/2011, 1433-1440. Viitattu 26.4.2014 https://journals.cambridge.org/action/displayFulltext?type=6&fid=8415192&jid=BJN&volumeId=106&issueId=09&aid=8415191&bodyId=&membershipNumber=&societyETOCSession=&fulltextType=RA&fileId=S0007114511001991



Dainese, S., Allemand, M., Ribeiro, N., Bayram, S., Martin, M. & Ehlert, U. 2011. Full-Length Research Report Protective Factors in Midlife How Do People Stay Healthy? The Journal of Gerontopsychology and Geriatric Psychiatry. Vol. 24 No. 1/2011, 19-29. Viitattu 27.9.2014 https://midus.wisc.edu/findings/pdfs/1193.pdf.

Hossein-Nezhad, A.; Spira, A. & Holick, M. 2013. Influence of Vitamin D Status and Vitamin D3 Supplementation on Genome Wide Expression of White Blood Cells: A Randomized Double-Blind Clinical Trial. Plos One. Vol. 8, No. 3/2013. Viitattu 26.4.2014  https://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0058725.



Kekkonen, R.; Lummela, N.; Karjalainen, H.; Latvala, S.; Tynkkynen, S.; Järvenpää, S.; Kautiainen, H.; Julkunen, I.; Vapaatalo, H. & Korpela, R. 2008. Probiotic intervention has strain-specific anti-inflammatory effects in healthy adults. World Journal Gastroenterology Vol.13, No 4/2008, 2029-2036. Viitattu 7.9.2014 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2701523/.  



Kiecolt-Glaser, J.; Belury, M.; Andridge, R.; Malarkey, W. & Glaser, R. 2011. Omega-3 Supplementation Lowers Inflammation in Healthy Middle-Aged and Older Adults: a randomized controlled trial. Brain, Behavior and Immunity Vol. 6, 8/2012, 988-955. Viitattu 25.11.2014 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3398219/.


Laaksi, I.; Ruohola, J.-P.; Mattila, V.; Auvinen, A.; Ylikormi, T. & Pihlajamäki, H. 2010. Vitamin D Supplementation for the Prevention of Acute Respiratory Tract Infection: A Randomized, Double-Blinded Trial among Young Finnish Men. Oxford journals. The Journal of Infectious Diseases. Vol 202, No. 5/2010, 809-814. Viitattu 31.1.2014 https://jid.oxfordjournals.org/content/202/5/809.long.



Rees, D.; Miles, E.; Banerjee, T.; Wells, S.; Roynette, C.; Wahle, K. & Calder, P. 2006. Dose-related effects of eicosapentaenoic acid on innate immune function in healthy humans: a comparison of young and older men. The American Journal of Clinical Nutrition Vol. 83, No. 2/2006, 331-342. Viitattu 13.9.2014 https://ajcn.nutrition.org/content/83/2/331.long.  



Romeo, J.; Wärnberg, J.; Nova, E.; Díaz, L.; Gómez-Martinez, S. & Marcos, A. 2007. Moderate alcohol consumption and the immune system: a review. The British Journal of Nutrition Vol. 98, No. 8/2007, 111-115. Viitattu 21.9.2014 https://journals.cambridge.org/download.php?file=%2FBJN%2FBJN98_S1%2FS0007114507838049a.pdf&code=f58dddd8e13fca510e7fa9d615b280fd.


Sabetta, J.; DePetrillo, P.; Cipriani, R.; Smardin, J.; Burns, L. & Landry, M. 2010. Serum 25-Hydroxyvitamin D and the Incidence of Acute Viral Respiratory Tract Infections in Healthy Adults. Plos One. Vol 5, No. 6/2010. Viitattu 26.4.2014 https://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0011088.



Segerstrom, S. & Sephton, S. 2010. Optimistic Expectancies and Cell-Mediated Immunity: The Role of Positive Affect. Psychological Science Vol. 21, No. 3/2010, 448-455. Viitattu 27.9.2014 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3933956/.

Segerstrom, S. & Miller, G. 2006. Psychological Stress and the Human Immune System: A Meta-Analytic Study of 30 Years of Inquiry. National Institutes of health Public Access. Psychological Bulletin Vol. 130, No. 6/2004, 601-630. Viitattu 25.8.2014 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1361287/.


Seifert, S.; Bub, A.; Franz, C. & Watzl, B. 2011. Probiotic Lactobacillus casei Shirota Supplementation Does Not Modulate Immunity in Healthy Men with Reduced Natural Killer Cell Activity. The Journal of Nutrition. Vol. 141, No 5/2011, 978-984. Viitattu 7.9.2014 https://jn.nutrition.org/content/141/5/978.long.



Smith, T.; Rigassio-Radlera, D.; Denmarka, R.; Haley, T. & and Touger-Deckera, R. 2013. Effect of Lactobacillus rhamnosus LGG® and Bifidobacterium animalis ssp. lactis BB-12® on health-related quality of life in college students affected by upper respiratory infections. British Journal of Nutrition. Vol. 109, No 11/2013, 1999-2007. Viitattu 6.9.2014 https://journals.cambridge.org/action/displayFulltext?type=6&fid=8920396&jid=BJN&volumeId=109&issueId=11&aid=8920395&bodyId=&membershipNumber=&societyETOCSession=&fulltextType=RA&fileId=S0007114512004138.