Respiratory Physiotherapy for POTS and disordered breathing

They've been selected for this attribute. The Panic cohort all received a prior panic attack diagnosis from psychiatry, before being referred to this study because they reported orthostasis as a known trigger for their panic attacks. The authors have then shown the hemodynamics and patterns of respiration in this Panic group differ from POTS-HV group (which specifically don't have panic attacks).

Fair point if they were told, I'm not sure they were. There's no reason to believe they were in the earlier studies when a wider POTS cohort was being studied, which is when the key findings were presented.

I understood this study to be a more narrow look at specific groups, probably to counter arguments that their earlier findings were simply representative of some HVS/panic attack muddying the waters.