Research recommendation(s) from an individual piece of guidance Guidance: Unilateral MRI-guided focused ultrasound thalamotomy for moderate to severe tremor in Parkinson’s disease Date issued: 28 February 2018 Research recommendations coming out of this guidance Further research on unilateral MRI-guided focused ultrasound thalamotomy for moderate to severe tremor in Parkinson's disease, which could include randomised controlled trials, should address patient selection and report on long-term follow-up.