CENTRAL	PubMed	EMBASE (Ovid)
#1 MeSH descriptor Tonsillectomy explode all trees #2 MeSH descriptor Palatine Tonsil explode all trees with qualifier: SU #3 tonsillectom*:ti OR tonsilectom*:ti OR adenotonsillectom*:ti OR adeno‐tonsillectom*:ti #4 (tonsil*:ti OR adenotonsil*:ti) AND (surg*:ti OR laser*:ti OR extract*:ti OR resect*:ti OR excis*:ti OR operat*:ti OR dissect*:ti OR remov*:ti OR coblat:ti* OR ablat*:ti) #5 (#1 OR #2 OR #3 OR #4)	#1 “Tonsillectomy” [Mesh] OR tonsillectom* [ti] OR tonsilectom* [ti] OR adenotonsillectom* [ti] OR adeno‐tonsillectom* [ti] #2 "Palatine Tonsil/surgery"[Mesh] #3 (Tonsil* [ti] OR adenotonsil* [ti]) AND (SURG* [ti] OR OPERAT* [ti] OR EXCIS* [ti] OR EXTRACT* [ti] OR REMOV* [ti] OR DISSECT* [ti] OR ABLAT* [ti] OR COBLAT* [ti] OR LASER* [ti]) #4 #1 OR #2 OR #3	1 exp *tonsillectomy/ 2 exp tonsil/su [Surgery] 3 (tonsillectom* or tonsilectom* or adenotonsillectom* or adeno‐tonsillectom*).ti. 4 ((Tonsil* or adenotonsil*) and (SURG* or OPERAT* or EXCIS* or EXTRACT* or REMOV* or DISSECT* or ABLAT* or COBLAT* or LASER*)).ti. 5 1 or 2 or 3 or 4
CINAHL (EBSCO)	Web of Science (Web of Knowledge)	ICTRP
S1 (MH "Tonsillectomy") S2 TI tonsillectom* OR tonsilectom* OR adenotonsillectom* OR adeno‐tonsillectom* S3 TI (tonsil* OR adenotonsil*) AND (surg* OR laser* OR extract* OR resect* OR excis* OR operat* OR dissect* OR remov* OR coblat* OR ablat*) S4 S1 or S2 or S3	#1 TI=(tonsillectom* or tonsilectom* or adenotonsillectom* or adeno‐tonsillectom*) #2 TI=((Tonsil* or adenotonsil*) and (SURG* or OPERAT* or EXCIS* or EXTRACT* or REMOV* or DISSECT* or ABLAT* or COBLAT* or LASER*)) #3 #1 OR #2	tonsillectom* OR tonsilectom* OR adenotonsillectom* OR adeno‐tonsillectom*