42It is for that reason that, following the ratification by the EU of the UN Convention, the Court took the view that the concept of ‘disability’ within the meaning of Directive 2000/78 must be understood as referring to a limitation which results in particular from long-term physical, mental or psychological impairments which, in interaction with various barriers, may hinder the full and effective participation of the person concerned in professional life on an equal basis with other workers (see judgments of 11 April 2013, HK Danmark, C‑335/11 and C‑337/11, EU:C:2013:222, paragraph 38; of 18 March 2014, Z., C‑363/12, EU:C:2014:159, paragraph 76; and of 18 December 2014, FOA, C‑354/13, EU:C:2014:2463, paragraph 53).