For citations:

Pavlyukova E.N., Kolosova M.V., Neklyudova G.V., Karpov R.S. Vortex flows and left ventricular twist in children aged one to five years old, born prematurely with low, very low, and extremely low birth weight. Ultrasound & Functional Diagnostics. 2021;(4):38-56. (In Russ.) https://doi.org/10.24835/1607-0771-2021-4-38-56