text: Abbreviations 
  CCI: Charlson comorbidity index; OSPRO: Optimal Screening for Prediction of 
  Referral and Outcome; OSPRO-ROS: Review of systems screening tool from 
  OSPRO cohort study; OSPRO-YF: Pain-related psychological distress screening 
  tool from OSPRO cohort study 
  
  Received: 9 November 2017 Accepted: 14 August 2018 