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Mannion, Anne F.; Mariaux, Francine; Reitmeir, Raluca; Fekete, Tamas F.; Haschtmann, Daniel; Loibl, Markus; Jeszenszky, Dezsö; Kleinstück, Frank S.; Porchet, François; Elfering, Achim (2020). Development of the "Core Yellow Flags Index" (CYFI) as a brief instrument for the assessment of key psychological factors in patients undergoing spine surgery. European spine journal, 29(8), pp. 1935-1952. Springer 10.1007/s00586-020-06462-z
