Not folk but
A short section of today's "Sunday" on BBC radio4 was about the LIME music for health project in Manchester UK.
http://www.bbc.co.uk/programmes/b08tbdp3  > ~17:40

" The delivery of specialist musical activity on the wards and at the bedsides of patients (This work is delivered by highly skilled Music for Health practitioners, trained by Music for Health Specialists)..."
https://musicforhealth.wordpress.com/about/