1. Department of Pediatrics (Neonatology), Pavol Jozef Šafárik University, Košice, Slovak Republic
2. Center for Fetal and Gynecological Diagnostics, JUHAMED, Košice, Slovak Republic
3. Division of Neonatal-Perinatal Medicine, C.S. Mott Children’s Hospital, Michigan Medicine, University of Michigan, Ann Arbor, MI, USA