You're referring to the study in JAMA (https://jamanetwork.com/journals/jama/fullarticle/2738552 https://jamanetwork.com/journals/jama/fullarticle/2738552)? I d

You're referring to the study in JAMA (https://jamanetwork.com/journals/jama/fullarticle/2738552 https://jamanetwork.com/journals/jama/fullarticle/2738552)? I don't claim to know with any confidence, but there are many possible confounders, so there's not necessarily anything we need to make of it if there are other reasons to believe the syndrome is psychosomatic. (For example, their control group doesn't seem to have lived in Cuba.)