Table 1

Criteria for study inclusion and exclusion

Inclusion criteriaExclusion criteria
Definition of symptoms that clearly indicates symptoms were not due to a disease processHysteria defined as anxiety disorder or hysterical personality
Motor symptoms are at least 50% of reported casesSymptoms not specified
Mean follow-up period ≥6 monthsStudies whose explicit purpose was the description of a treatment intervention
A report of clinical outcomeFollow-up only focused on misdiagnosis
Article in EnglishOnly abstract available
Number of patients ≥8Fatigue without specific description of limb weakness or movement disorder
Adult study