@article{3031012,
    title = "Vitamin D deficiency correlates with a reduced number of natural killer
cells in intensive care unit (ICU) and non-ICU patients with COVID-19
pneumonia",
    author = "Vassiliou, Alice G. and Jahaj, Edison and Pratikaki, Maria and and Keskinidou, Chrysi and Detsika, Maria and Grigoriou, Eirini and Psarra, and Katherina and Orfanos, Stylianos E. and Tsirogianni, Alexandra and and Dimopoulou, Ioanna and Kolanidou, Anastasia",
    journal = "Ελληνική καρδιολογική επιθεώρηση",
    year = "2021",
    volume = "62",
    number = "5",
    pages = "381-383",
    publisher = "HELLENIC CARDIOLOGICAL SOC",
    issn = "1011-7970",
    doi = "10.1016/j.hjc.2020.11.011",
    keywords = "COVID-19; Vitamin D; Natural killer cells"
}