cthist 2.1.10

• Added earliest argument to clinicaltrials_gov_download to allow
  a user to specify that they would like to download only the earliest
  version of a trial record

cthist 2.1.9

• Added locations data download

cthist 2.1.8

• Added proper citation information linking to the PLOS ONE paper

cthist 2.1.7

• Added new function extract_publications to extract publications by type from a data frame of downloaded versions into a new data frame.

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

cthist 2.1.4

• Fix bug in which start date would erroneously return NA in some cases

cthist 2.1.3

cthist 2.1.3

• Add support for downloading the latest version of a clinical trial
  only

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cthist 2.1.2

• Fix bug where missing start dates in trial record would produce an
  error

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cthist 2.1.1

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

cthist 2.1.0

• Added download for organization study ID and secondary ID's
• Added unit tests for all functions added since v 1.4.2

cthist 2.0.1

• Minor changes to documentation to better reflect downloaded data