91As regards, in the third place, the question of what criteria should guide the competent national authorities in carrying out that assessment, it must be noted that, in order to fall within the scope of Article 4 of the Charter, which corresponds to Article 3 ECHR, and of which the meaning and scope are therefore, in accordance with Article 52(3) of the Charter, the same as those laid down by the ECHR, the deficiencies referred to in the preceding paragraph of the present judgment must attain a particularly high level of severity, which depends on all the circumstances of the case (ECtHR, 21 January 2011, M.S.S. v. Belgium and Greece, CE:ECHR:2011:0121JUD003069609, paragraph 254).
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