There's nothing in the 'Conflict of Interest' section to suggest that. Getting a cohort of experienced meditators together is not the easiest so perhaps they're

There's nothing in the 'Conflict of Interest' section to suggest that. Getting a cohort of experienced meditators together is not the easiest so perhaps they're just using what (who) they have. I know nothing about BMV but an antecedent paper they cite contrasts it with mindfulness, the most commonly-studied form of meditation, and it mentions that BMV involves movement, so it at least seems to be an atypical practice.