Downton Abbey creator Lord Julian Fellowes was successfully treated for essential tremor at St. Mary’s Hospital, London with the incisionless focused ultrasound therapy from Israel’s Insightec. He had lost the ability to write by hand due to involuntary shaking.

https://insightec.com/news/downton-abbey-creator-lord-julian-fellowes-successfully-treated-for-essential-tremor-with-insightecs-incisionless-focused-ultrasound-therapy/

https://en.wikipedia.org/wiki/Downton_Abbey