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Male infertility: decreased levels of selenium, zinc and antioxidants.
Türk S, Mändar R, Mahlapuu R, Viitak A, Punab M, Kullisaar T. Türk S, et al. Among authors: viitak a. J Trace Elem Med Biol. 2014 Apr;28(2):179-185. doi: 10.1016/j.jtemb.2013.12.005. Epub 2013 Dec 31. J Trace Elem Med Biol. 2014. PMID: 24462254
Can selenium levels act as a marker of colorectal cancer risk?
Lener MR, Gupta S, Scott RJ, Tootsi M, Kulp M, Tammesoo ML, Viitak A, Metspalu A, Serrano-Fernández P, Kładny J, Jaworska-Bieniek K, Durda K, Muszyńska M, Sukiennicki G, Jakubowska A, Lubiński J. Lener MR, et al. Among authors: viitak a. BMC Cancer. 2013 Apr 29;13:214. doi: 10.1186/1471-2407-13-214. BMC Cancer. 2013. PMID: 23627542 Free PMC article.
Selenium levels of Estonians.
Rauhamaa P, Kantola M, Viitak A, Kaasik T, Mussalo-Rauhamaa H. Rauhamaa P, et al. Among authors: viitak a. Eur J Clin Nutr. 2008 Sep;62(9):1075-8. doi: 10.1038/sj.ejcn.1602818. Epub 2007 May 30. Eur J Clin Nutr. 2008. PMID: 17538536