cthist 2.0.0

• Upgrade to allow compatibility with 2023 ClinicalTrials.gov website re-write

cthist 1.4.1

• 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

cthist 1.4.0

Apologies, I forgot to tag releases on here after 1.0.0, so here's everything that's new since then:

cthist 1.4.0

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

---

cthist 1.3.0

• 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)

---

---

cthist 1.2.1

• 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

---

cthist 1.2.0

• 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

---

cthist 1.1.0

• Added "why stopped" field
• Remove superfluous white space from overall status field
• Fixed bug that occurs in rare cases (version has no overall status)

---

cthist 1.0.1

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

Updates in light of peer review

• 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 bug where post-completion versions are sometimes not downloaded

Fix bug where post-completion versions are sometimes not downloaded from DRKS

DRKS fix bug where multiple affiliation nodes causes error

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

Updates to testing and error messaging

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

First release

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