Text and Data Mining valid from 2018-02-05
Received: 2 May 2017
Revised: 7 November 2017
Accepted: 17 January 2018
First Online: 5 February 2018
Compliance with Ethical Standards
: This study was approved by the Colorado Multiple Institutional Review Board and adhered to the Transparent Reporting of a multivariable prediction model for Individual Prognosis or Diagnosis (TRIPOD) statement on reporting predictive models.CitationRef removed
: The authors declare that they do not have a conflict of interest.