TI  - Could decreased vitamin D levels be related with impaired cardiac autonomic functions in patients with chronic heart failure:  an observational study
AU  - Çetin, M.
AU  - Kozdağ, G.
AU  - Ural, D.
AU  - Kahraman, G.
AU  - Yılmaz, İ.
AU  - Akay, Y.
AU  - Onuk, R.
AU  - Dursun, N.
SO  - The Anatolian Journal of Cardiology 2014;14:434-441.
DO  - 10.5152/akd.2014.4869