Anemia, Hepcidin, and Vitamin D in Healthy Preterm Infants: A Pilot Study. - Koren, Yael; Lubetzky, Ronit; Mandel, Dror; Ovental, Amit; Deutsch, Varda; Hadanny, Amir; Moran-Lev, Hadar (American Journal of Perinatology, 2023)