CENTRAL	PubMed	EMBASE (Ovid)
#1 VOICE DISORDERS single term (MeSH) #2 LARYNGISMUS single term (MeSH) #3 spasm* NEAR dysphoni* or spastic NEAR dysphoni* OR flaccid NEAR dysphoni* OR hyperkinetic NEAR dysphoni* OR respiratory NEAR dysphoni* OR laryngospasm* NEAR dysphoni* #4 phonation NEXT disorder* OR laryngeal NEXT dystonia* OR neurologic* NEXT voice NEXT disorder* #5 ABSD OR ADSD #6 #1 OR #2 OR #3 OR #4 OR #5 #7 BOTULINUM TOXINS explode all trees (MeSH) #8 botulin* OR botox* OR dysport* OR oculinum* OR myobloc* OR neurobloc* OR botb* OR cs NEXT bot* OR vistabel* #9 #7 OR #8 #10 #6 AND #9	(("VOICE DISORDERS"[MeSH]) OR ("LARYNGISMUS"[Mesh]) OR ((SPASM*[tiab] OR SPASTIC[tiab] OR FLACCID[tiab] OR HYPERKINETIC[tiab] OR RESPIRATORY[tiab] OR LARYNGOSPASM[tiab]) AND DYSPHONI*[tiab]) OR ((PHONATION[tiab] OR DISORDER*[tiab]) OR (LARYNGEAL[tiab] AND DYSTONIA[tiab]) OR NEUROLOGIC[tiab] AND VOICE[tiab] AND DISORDER*[tiab) OR ((PHONATION[tiab] OR DISORDER*[tiab]) OR (LARYNGEAL[tiab] AND DYSTONIA[tiab]) OR (NEUROLOGIC[tiab] AND VOICE[tiab] AND DISORDER*[tiab])) OR (ABSD[tiab])) AND ((BOTULIN*[tiab] OR BOTOX*[tiab] OR DYSPORT*[tiab] OR OCULINUM*[tiab] OR MYOBLOC*[tiab] OR NEUROBLOC*[tiab] OR BOTB*[tiab] OR (CS[tiab] AND BOT*[tiab]) OR VISTABEL*[tiab]) OR ("Botulinum Toxins"[MeSH]))	1 LARYNX DISORDER/ or LARYNX SPASM/ or DYSPHONIA/ 2 LARYNX/ and DYSTONIA/ 3 ((SPASM* or SPASTIC or FLACCID or HYPERKINETIC or RESPIRATORY or LARYNGOSPASM*) and DYSPHONI*).tw. 4 ((PHONATION adj DISORDER*) or (LARYNGEAL adj DYSTONIA) or (NEUROLOGIC adj VOICE adj DISORDER*)).tw. 5 ABSD.tw. 6 4 or 1 or 3 or 2 or 5 7 BOTULINUM TOXIN/ or BOTULINUM TOXIN A/ or BOTULINUM TOXIN B/ 8 (BOTULIN* or BOTOX* or DYSPORT* or OCULINUM* or MYOBLOC* or NEUROBLOC* or BOTB* or (CS adj BOT*) or VISTABEL*).tw. 9 8 or 7 10 6 and 9
CINAHL	Web of Science	mRCT
S1 (MH "Voice Disorders") S2 TX ( SPASM* OR SPASTIC OR FLACCID OR HYPERKINETIC OR RESPIRATORY OR LARYNGOSPASM* ) and TX dysphoni* S3 TX ABSD S4 (MH "Botulinum Toxins") S5 TX ( BOTULIN* OR BOTOX* OR DYSPORT* OR OCULINUM* OR MYOBLOC* OR NEUROBLOC* OR BOTB* OR VISTABEL* ) or ( CS AND BOT* ) S6 S4 or S5 S7 S1 or S2 or S3 S8 S6 and S7	#1 TS=((SPASM* or SPASTIC or FLACCID or HYPERKINETIC or RESPIRATORY or LARYNGOSPASM*) and DYSPHONI*) #2 TS=((PHONATION adj DISORDER*) or (LARYNGEAL adj DYSTONIA) or (NEUROLOGIC adj VOICE adj DISORDER*)) #3 TS=(BOTULIN* or BOTOX* or DYSPORT* or OCULINUM* or MYOBLOC* or NEUROBLOC* or BOTB* or (CS adj BOT*) or VISTABEL*) #4 TS=ABSD #5 #4 OR #2 OR #1 #6 #5 AND #3	(dysphon% OR dyston% OR voice OR phonation OR ABSD) AND (botulin% OR botox OR DYSPORT% OR OCULINUM% OR MYOBLOC% OR NEUROBLOC% OR BOT% OR VISTABEL%)