| ctrFindActiveSubstanceSynonyms | Find synonyms of an active substance |
| ctrGetQueryUrl | Extract query parameters and register name from input or from clipboard into which the URL of a register search was copied |
| ctrGetQueryUrlFromBrowser | Import from clipboard the URL of a search in one of the registers |
| ctrLoadQueryIntoDb | Retrieve or update information on clinical trials from register and store in database |
| ctrOpenSearchPagesInBrowser | Open advanced search pages of register(s) or execute search in browser |
| dbFindFields | Find names of fields in the database collection |
| dbFindIdsUniqueTrials | Deduplicate records to provide unique clinical trial identifiers |
| dbGetFieldsIntoDf | Create data frame by extracting specified fields from database collection |
| dbQueryHistory | Show the history of queries that were loaded into a database |
| dfListExtractKey | Extract named element(s) from list(s) into long-format data frame |
| dfMergeTwoVariablesRelevel | Merge two variables into one, optionally map values to new levels |
| dfName2Value | Extract information of interest (e.g., endpoint) from long data frame of protocol- or result-related trial information as returned by dfTrials2Long |
| dfTrials2Long | Extract trial information into long format |
| installCygwinWindowsDoInstall | Convenience function to install a minimal cygwin environment under MS Windows, including perl, sed and php |