AUTHOR=Banerjee Arijita TITLE=Understanding the shortcomings of heart rate variability as a tool for autonomic analysis JOURNAL=Frontiers in Physiology VOLUME=Volume 17 - 2026 YEAR=2026 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2026.1760160 DOI=10.3389/fphys.2026.1760160 ISSN=1664-042X