Table 1.

Study inclusion and exclusion criteria

Criteria	Included	Excluded
Type of study	All study designs, both prospective and retrospective (except case studies for one patient)	Case studies for one patient
Population	Adult patients NeP due to any cause (central or peripheral) Treatment-refractory NeP (as defined in the included studies)	Studies in children Treatment naive patients
Study size	Any	None
Trial length	Any	None
Interventions	Pregabalin Lidocaine plaster Duloxetine	Other treatment for NeP
Comparator	Any/None	-
Language	English language only	Non-English language