CENTRAL and Cochrane ENT Register (CRS)	MEDLINE (Ovid)	Embase (Ovid)	AMED (Ovid)
1 MESH DESCRIPTOR Tinnitus EXPLODE ALL  2 (zumbido or tinnit*):AB,EH,KW,KY,MC,MH,TI,TO  3 MESH DESCRIPTOR Ginkgo biloba EXPLODE ALL  4 (Ginkgo* or Gingko* or Ginko* or Maidenhair):AB,EH,KW,KY,MC,MH,TI,TO  5(Egb 761 or Egb761 or EGb‐761 or GBE 761 or GBE761 or GBE‐761):AB,EH,KW,KY,MC,MH,TI,TO  6 (GBE50 or EGB50):AB,EH,KW,KY,MC,MH,TI,TO  7 (rokan or tanakan or tebofortran or tebokan or tebonin or Kavari):AB,EH,KW,KY,MC,MH,TI,TO  8 (LI 1370 or LI1370 or LI‐1370):AB,EH,KW,KY,MC,MH,TI,TO  9 (flavanoid* or terpenoid* or bioflavanoid*):AB,EH,KW,KY,MC,MH,TI,TO  10 (gingkco* or gingho* or ginosan* or bilobalid* or tanakene or supergin*):AB,EH,KW,KY,MC,MH,TI,TO  11 (biloba):AB,EH,KW,KY,MC,MH,TI,TO  12 (Eun‐haeng* OR Fossil Tree* OR Ginkyo* OR Icho* OR Ityo* OR Japanese Apricot* OR Kew Tree* OR Salisburia* OR Silver Apricot* OR Pterophyllus salisburiensis OR Yinxingye* OR Prunus Ume OR Prunus mume):AB,EH,KW,KY,MC,MH,TI,TO  13 #1 OR #2  14 #3 OR #4 OR #5 OR #6 OR #7 OR #8 OR #9 OR #10 OR #11 OR #12  15 #13 AND #14	1 exp Tinnitus/  2 (tinnit* or zumbido).ti,ab.  3 1 or 2  4 exp Ginkgo biloba/  5 (Ginkgo* or Gingko* or Ginko* or Maidenhair).ab,ti.  6 (Egb 761 or Egb761 or EGb‐761 or GBE 761 or GBE761 or GBE‐761).ab,ti.  7 (GBE50 or EGB50).ab,ti.  8 (rokan or tanakan or tebofortran or tebokan or tebonin or Kavari).ab,ti. 9 (LI 1370 or LI1370 or LI‐1370).ab,ti.  10 (flavanoid* or terpenoid* or bioflavanoid*).ab,ti.  11 (gingkco* or gingho* or ginosan* or bilobalid* or tanakene or supergin*).ab,ti.  12 (ginkgo* or "LI 1370").nm.  13 biloba.ab,ti.  14 (Eun‐haeng* or Fossil Tree* or Ginkyo* or Icho* or Ityo* or Japanese Apricot* or Kew Tree* or Salisburia* or Silver Apricot* or Pterophyllus salisburiensis or Yinxingye* or Prunus Ume or Prunus mume).ab,ti.  15 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14  16 3 and 15	1 exp tinnitus/  2 (tinnit* or zumbido).ab,ti.  3 1 or 2  4 exp Ginkgo biloba/  5 (Ginkgo* or Gingko* or Ginko* or Maidenhair).ab,ti.  6 (Egb 761 or Egb761 or EGb‐761 or GBE 761 or GBE761 or GBE‐761).ab,ti.  7 (GBE50 or EGB50).ab,ti.  8 (rokan or tanakan or tebofortran or tebokan or tebonin or Kavari).ab,ti.  9 (LI 1370 or LI1370 or LI‐1370).ab,ti.  10 (flavanoid* or terpenoid* or bioflavanoid*).ab,ti.  11 (gingkco* or gingho* or ginosan* or bilobalid* or tanakene or supergin*).ab,ti.  12 biloba.ab,ti.  13 (Eun‐haeng* or Fossil Tree* or Ginkyo* or Icho* or Ityo* or Japanese Apricot* or Kew Tree* or Salisburia* or Silver Apricot* or Pterophyllus salisburiensis or Yinxingye* or Prunus Ume or Prunus mume).ab,ti.  14 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13  15 3 and 14	1 exp Tinnitus/           2 (tinnit* or zumbido).ti,ab. 3 1 or 2            4  exp Ginkgo biloba/            5 (Ginkgo* or Gingko* or Ginko* or Maidenhair).ab,ti.            6 (Egb 761 or Egb761 or EGb‐761 or GBE 761 or GBE761 or GBE‐761).ab,ti. 7 (GBE50 or EGB50).ab,ti.            8 (rokan or tanakan or tebofortran or tebokan or tebonin or Kavari).ab,ti.            9 (LI 1370 or LI1370 or LI‐1370).ab,ti.            10 (flavanoid* or terpenoid* or bioflavanoid*).ab,ti.            11 (gingkco* or gingho* or ginosan* or bilobalid* or tanakene or supergin*).ab,ti.            12 biloba.ab,ti.            13 (Eun‐haeng* or Fossil Tree* or Ginkyo* or Icho* or Ityo* or Japanese Apricot* or Kew Tree* or Salisburia* or Silver Apricot* or Pterophyllus salisburiensis or Yinxingye* or Prunus Ume or Prunus mume).ab,ti.            14 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13            15 3 and 14
CINAHL (EBSCO)	Web of Science (Web of Knowledge)	Trial registries	Other
S15      S3 AND S14                   S14      S4 OR S5 OR S6 OR S7 OR S8 OR S9 OR S10 OR S11 OR S12 OR S13            S13      TX Eun‐haeng* or Fossil Tree* or Ginkyo* or Icho* or Ityo* or Japanese Apricot* or Kew Tree* or Salisburia* or Silver Apricot* or Pterophyllus salisburiensis or Yinxingye* or Prunus Ume or Prunus mume            S12      TX biloba            S11      TX gingkco* or gingho* or ginosan* or bilobalid* or tanakene or supergin*  S10      TX flavanoid* or terpenoid* or bioflavanoid*  S9        TX LI 1370 or LI1370 or LI‐1370  S8        TX rokan or tanakan or tebofortran or tebokan or tebonin or Kavari  S7        TX GBE50 or EGB50  S6        TX Egb 761 or Egb761 or EGb‐761 or GBE 761 or GBE761 or GBE‐761  S5        TX Ginkgo* or Gingko* or Ginko* or Maidenhair  S4        (MH "Ginkgo Biloba")  S3        S1 OR S2  S2        TX tinnit* or zumbido  S1        (MH "Tinnitus")	# 12 #11 AND #1 Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years # 11 #10 OR #9 OR #8 OR #7 OR #6 OR #5 OR #4 OR #3 OR #2 Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years # 10 TOPIC: (Eun‐haeng* or Fossil Tree* or Ginkyo* or Icho* or Ityo* or Japanese Apricot* or Kew Tree* or Salisburia* or Silver Apricot* or Pterophyllus salisburiensis or Yinxingye* or Prunus Ume or Prunus mume) Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years         # 9 TOPIC: (biloba)  Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years           # 8 TOPIC: (gingkco* or gingho* or ginosan* or bilobalid* or tanakene or supergin*) Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years  # 7 TOPIC: (flavanoid* or terpenoid* or bioflavanoid*) Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years # 6 TOPIC: (LI 1370 or LI1370 or LI‐1370)            Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years           # 5 TOPIC: (rokan or tanakan or tebofortran or tebokan or tebonin or Kavari) Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years           # 4 TOPIC: (GBE50 or EGB50) Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years            # 3 TOPIC: (Egb 761 or Egb761 or EGb‐761 or GBE 761 or GBE761 or GBE‐761) Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years #2 TOPIC: (Ginkgo* or Gingko* or Ginko* or Maidenhair) Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years            # 1 TOPIC: (tinnit* or zumbido) Indexes=SCI‐EXPANDED, CPCI‐S Timespan=All years	ClinicalTrials.gov tinnitus | ( Ginkgo OR Gingko OR Ginko OR gingkco OR gingho OR maidenhair )           ICTRP tinnitus AND ginkgo OR tinnitus AND gingko OR tinnitus AND ginko OR tinnitus AND gingkco OR tinnitus AND gingho OR tinnitus AND maidenhair	LILACS tw:(tinnit* OR zumbido) AND ( db:("LILACS") AND type_of_study:("clinical_trials")) CNKI via Google Scholar site:en.cnki.com.cn tinnitus ( Ginkgo OR Gingko OR Ginko OR gingkco OR gingho OR maidenhair ) Google Scholar allintitle: tinnitus ( Ginkgo OR Gingko OR Ginko OR gingkco OR gingho OR maidenhair )