Psychometric evaluation of the Optimal Screening for Prediction of Referral and Outcome Yellow Flag (OSPRO-YF) tool: factor structure, reliability, and validity.

Butera KA, George SZ, Lentz TA. J Pain. 2019 Sep 18. pii: S1526-5900(19)30811-9. doi: 10.1016/j.jpain.2019.09.003.

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