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Haanstra, Tsjitske M., Kamper, Steven J., Williams, Christopher M., Spriensma, Alette S., Lin, Chung-Wei Christine, Maher, Christopher G., de Vet, Henrica C. W., Ostelo, Raymond W. J. G.. Lippincott Williams & Wilkins; 2015. Does adherence to treatment mediate the relationship between patients' treatment outcome expectancies and the outcomes of pain intensity and recovery from acute low back pain?.