cthist 2.1.6

Fixed bug where download will throw an error in cases where a record has secondary outcome measures specified, but not primary outcome measures

cthist 2.1.5

Added argument latest to function clinicaltrials_gov_download to allow downloading only the latest version for many clinical trial registry entries

Fix minor errors in documentation
Fix bug where missing primary completion dates in trial record would produce an error

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Temporary fix of bugs introduced by ClinicalTrials.gov moving to their new website design (changed URL links to classic.clinicaltrials.gov)

Fixed bug where cthist sometimes can’t connect to ClinicalTrials.gov by replacing the statement that included RCurl::url.exists() with one that uses httr::http_error() instead
Removed polite dependency and functionality

Removed drks.de-related functions
Added polite variable to allow disabling of “polite” downloading for debugging purposes
Removed deprecated .data$n syntax

Added “results posted” (indicates whether study results have been posted)
Added “references” to clinicaltrials_gov_version() (citations, links and available IPD/Information) and drks_de_version() (Trial Publications, Results and other Documents)

Implemented checks in clinicaltrials_gov_download() and drks_de_download() that the Internet resources are available and fails gracefully in the case that they’re not

Added status_change_only option to clinicaltrials_gov_dates() function to allow for downloading only the dates on which a trial’s Recruitment Status changed

Fix bug where cthist does not capture outcome measures in versions posted after results are posted.

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

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

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

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

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