%0 Journal Article %T Are Peripheral Natural Killer Cells and Interleukin-21 Interrelated in Psoriasis Pathogenesis? %A Doaa Salah Hegab %A Lamia Hamouda Elgarhy %A Mohamed Attia %J Archive of "Annals of Dermatology". %D 2017 %R 10.5021/ad.2017.29.1.108 %X Dear Editor %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5318508/