ctrFindActiveSubstanceSynonyms
                        Find synonyms of an active substance
ctrGetQueryUrl          Get query details
ctrLoadQueryIntoDb      Load and store register trial information
ctrOpenSearchPagesInBrowser
                        Open stored query in register or its search
                        page
ctrdata-package         ctrdata: get started, connect database and
                        function overview
ctrdata-registers       ctrdata: information on clinical trial
                        registers
dbFindFields            Find names of fields in the database collection
dbFindIdsUniqueTrials   Get identifiers of deduplicated trial records
dbGetFieldsIntoDf       Create data frame of specified fields from
                        database collection
dbQueryHistory          Show history of queries loaded into a database
                        collection
dfListExtractKey        Extract named element(s) from list(s) into
                        long-format data frame
dfMergeTwoVariablesRelevel
                        Merge two variables
dfName2Value            Get value for variable of interest
dfTrials2Long           Convert data frame with trial records into long
                        format
installCygwinWindowsDoInstall
                        Install necessary helper apps (Windows only)
