HEART rate variability biofeedback for long COVID symptoms (HEARTLOC): protocol for a feasibility study.
Joanna CorradoStephen J HalpinNick PrestonDiana WhitesideRachel TarrantJennifer DavisonAlexander D SimmsRory J O'ConnorAlexander J CassonManoj SivanPublished in: BMJ open (2022)
NCT05228665.