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Strength of Recommendation (SOR) Definition
A Recommendation based on consistent and good-quality patient-oriented evidence.*
B Recommendation based on inconsistent or limited-quality patient-oriented evidence.*
C Recommendation based on consensus, usual practice, opinion, disease-oriented evidence, or case series for studies of diagnosis, treatment, prevention, or screening.*

*See Appendix A on pages 1603–1606 for further information.

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