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Table 1 Strategies for database search

From: External control of fluoridation in the public water supplies of Brazilian cities as a strategy against caries: a systematic review and meta-analysis

Database Search Strategy (August, 2020)
Main database
MedLine (via PubMed)
http://www.ncbi.nlm.nih.gov/pubmed
(“Drinking Water" OR "Drinking Water" OR "Potable Water" OR “public water supply” OR “Water fluoridation” OR “Water supply”) AND (“Quality Control” OR “monitoring” OR “External Control” OR “Fluoride concentration” OR “Operational control”) AND (“Brazil” OR “Brazilian”)
Scopus
http://www.scopus.com/
( ( "Drinking Water" OR "Potable Water" OR "public water supply" OR "Water fluoridation" OR "Water supply") AND ( "Quality Control" OR "monitoring" OR "External Control" OR "Fluoride concentration") AND ( "Brazilian" OR "Brazil"))
LILACS
http://lilacs.bvsalud.org/
tw:( "Drinking Water" AND “External Control”) AND (instance:"regional") AND (db:("LILACS"))
tw:( “public water supply” AND “External Control”) AND (instance:"regional") AND (db:("LILACS"))
tw:(“Water fluoridation” AND “External Control”) AND (instance:"regional") AND (db:("LILACS"))
tw:(“Fluoretação da água” AND “Heterocontrole”) AND (instance:"regional") AND (db:("LILACS"))
tw:(“Fluoreto” AND “Água de abastecimento”) AND (instance:"regional") AND (db:("LILACS"))
tw:(“public water supply” AND “Fluoride content monitoring”) AND (instance:"regional") AND (db:("LILACS"))
tw:(“water for human consumption” AND “Fluoride”) AND (instance:"regional") AND (db:("LILACS"))
SciELO
http://www.scielo.org/
Drinking Water AND External Control
Public water supply AND External Control
Water fluoridation AND External Control
Fluoretação da água AND Heterocontrole
Fluoreto AND Água de abastecimento
Public water supply AND Fluoride content monitoring
Water for human consumption AND Fluoride
Embase
http://www.embase.com
('drinking water'/exp OR 'drinking water' OR 'potable water'/exp OR 'potable water' OR 'public water supply' OR 'water fluoridation'/exp OR 'water fluoridation' OR 'water supply'/exp OR 'water supply') AND ('quality control'/exp OR 'quality control' OR 'monitoring'/exp OR 'monitoring' OR 'external control' OR 'fluoride concentration') AND ('Brazilian'/exp OR 'Brazilian' OR 'brazil'/exp OR 'brazil')
Web Of Science
http://apps.webofknowledge.com/
((“Drinking Water" OR "Drinking Water" OR "Potable Water" OR “public water supply” OR “Water fluoridation” OR “Water supply”) AND (“Quality Control” OR “monitoring” OR “External Control” OR “Fluoride concentration” OR “Operational control”) AND (“Brazil” OR “Brazilian”))
Grey literature
OpenGrey
http://www.opengrey.eu/
("Water fluoridation” OR “public water supply”) AND (“External Control” OR “Quality Control”)
("Fluoridation" OR "Fluorides") AND ("Water Quality Control" OR "Water monitoring")
OpenThesis
http://www.openthesis.org/
("Fluoridation" OR "Fluorides") AND ("Water Quality Control" OR "Water monitoring")
("Water fluoridation” OR “public water supply”) AND (“External Control” OR “Quality Control”)
Open Access
Theses and Dissertations (OATD)
https://oatd.org/
("Fluoridation" OR "Fluorides") AND ("Water Quality Control" OR "Water monitoring")
("Water fluoridation” OR “public water supply”) AND (“External Control” OR “Quality Control”)