Table 1:

Search queries as entered for the specific databases

Data Base	PubMed	Web of Science	Scopus
Search query	(“transforaminal*"[All Fields] OR “foraminal*"[All Fields]) AND (“spinal puncture"[MeSH Terms] OR (“spinal"[All Fields] AND “puncture*"[All Fields]) OR (“lumbar"[All Fields] AND “puncture*"[All Fields]) OR “intrathecal*"[All Fields])	TS=(transforaminal* OR foraminal*) AND TS=((spinal AND puncture*) OR (lumbar AND puncture*) OR intrathecal*)	TITLE-ABS-KEY ((transforaminal* OR foraminal*)) AND (TITLE-ABS-KEY ((spinal AND puncture*) OR (lumbar AND puncture*) OR intrathecal*)) AND (LIMIT-TO (LANGUAGE, “English”))