Table 1.

Planned inclusion and exclusion criteria

	Inclusion criteria	Exclusion criteria
Population	Adult patients (>18 years) with a tremor diagnosis of confirmed aetiology Unilateral or bilateral lesional functional neurosurgical intervention in a central neuroanatomical structure By incisional (placement of a stylette, leukotome, cryosurgery or radiofrequency probe after skull opening) or incision-less (transcranially focused ultrasound (MRI-guided focused ultrasound), radiation energy (Gamma Knife) means	Cases subjected to lesional functional neurosurgery in more than one anatomical structure at the same time Or stimulation techniques (deep brain stimulation)
Study design	Randomised controlled trials, meta-analysis, case-control, prospective and retrospective case series A minimum of five subjects included per cohort (indication/treatment) Minimum follow-up of 2 months after the intervention	Studies reporting results from mixed aetiologies or mixed intervention (different anatomical targets or techniques)
Efficacy outcome	Reporting tremor outcome on a validated tremor scale
Safety outcome	Side effects after unilateral only interventions	Cohorts including bilateral interventions
Type of publication	Peer-reviewed articles without language restriction	Letters, abstracts and editorials