AUTHOR=Billman George E. , Sacha Jerzy , Werner Bozena , Jelen Piotr Jerzy , Gąsior Jakub S. TITLE=Editorial: Heart Rate Variability and Other Autonomic Markers in Children and Adolescents JOURNAL=Frontiers in Physiology VOLUME=10 YEAR=2019 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2019.01265 DOI=10.3389/fphys.2019.01265 ISSN=1664-042X