Following on from Tinkerbell's post yesterday, there is a fuller explanation in the Express that you can find at express.co.uk/life-style/he...
I don't have access to the BMJ, but if anyone does and could post it here, there is apparently a write up by Dr. Abbas Zaidi in the Case Reports section.
I suspect this won't be a miracle cure, but another weapon in the MPN armory can't be a bad thing.