cthist 1.0.0

• Re-implemented functions that access ClinicalTrials.gov or DRKS.de with the polite R package to ensure that the sites’ rules regarding scraping are observed, and to limit the number of requests
• Fix bug where non-English locale prevents correct parsing of month names
• Improvements to error-catching during download
• New columns indicating the precision of dates in the original data source
• All functions now check that input is well-formed before executing and provide informative errors otherwise
• clinicaltrials_gov_download() and drks_de_download() now return a data frame of results if output_filename is not specified
• clinicaltrials_gov_version() and drks_de_version() now return named lists rather than vectors
• Added default version numbers to clinicaltrials_gov_version() and drks_de_version()
• More extensive unit testing
• Fix bug in retrieving “gender based” in clinicaltrials_gov_version()
• Add “quiet” downloading option
• Improved documentation

cthist 0.1.4

• Fix DRKS bug where post-completion records sometimes contain more than one li.deadline node, causing formatting errors

cthist 0.1.3

• Fix DRKS bug where multiple contact affiliation nodes caused download to produce an error

cthist 0.1.2

• Updated DRKS error message to be more informative on failure
• Updated unit tests to expect graceful error on failure

cthist 0.1.1

• Renamed function clinicaltrials_gov_version_dates to clinicaltrials_gov_dates for brevity
• Renamed function clinicaltrials_gov_version_data to clinicaltrials_gov_version for brevity
• Renamed function drks_de_version_dates to drks_de_dates for brevity
• Renamed function drks_de_version_data to drks_de_version for brevity

cthist 0.1.0

• Added a NEWS.md file to track changes to the package.
• Added function clinicaltrials_gov_version_dates to download dates on which a ClinicalTrials.gov registry entry is updated
• Added function clinicaltrials_gov_version_data to download registry data for a specific historical version of a clinical trial registry entry from ClinicalTrials.gov
• Added function clinicaltrials_gov_download to mass-download all historical versions of a set of ClinicalTrials.gov registry entry
• Added function drks_de_version_dates to download dates on which a DRKS.de registry entry is updated
• Added function drks_de_version_data to download registry data for a specific historical version of a clinical trial registry entry from DRKS.de
• Added function drks_de_download to mass-download all historical versions of a set of DRKS.de registry entry