CENTRAL	ENT Register	COVID‐19 Register	MEDLINE	Embase	WOS	Trial registries via CRS	ClinicalTrials.gov	ICTRP
July 2021	16/11/2020_TO_22/07/2021:CRSINCENTRAL AND CENTRAL:TARGET	All years	NOT Anosmia_202012_COVID Register FID_109833:FOLDER AND COVID19:INREGISTER	31 limit 30 to ed=20201116‐20210722 32 limit 30 to dt=20201116‐20210722 33 31 or 32	limit 63 to dd=20201116‐20210722	Monthly alerts: 30/12/2020 28/01/2021 24/02/2021 25/03/2021 21/04/2021 20/05/2021 17/06/2021 15/07/2021	16/11/2020_TO_22/07/2021:CRSINCENTRAL AND CENTRAL:TARGET	n/a	n/a
August 2021	22/06/2021_TO_17/08/2021:CRSINCENTRAL AND CENTRAL:TARGET	All years	Anosmia_202107_COVID Register FID_133410:FOLDER OR "Anosmia_202012_COVID Register FID_109833":FOLDER	31 limit 30 to ed=20210622‐20210817 32 limit 30 to dt=20210622‐20210817 33 33 31 or 32	limit 63 to dd=20210622‐20210817	Monthly alert: 11/08/2021	22/06/2021_TO_17/08/2021:CRSINCENTRAL AND CENTRAL:TARGET	n/a	n/a
September 2021	All years	All years	All years	All years	All years	All years	All years	n/a	n/a