Decision on the ex-officio investigation in the field of materials and preparations related to kidney diseases, for possible violation of Articles 1 and 2 of the Greek Competition Act 3959/2011 on "Protection of free competition" (and / or Articles 1 and 2 of Law. 703/1977, as in force) and / or Articles 101 and 102 of the Treaty on the Functioning of the European Union (T.F.E.E.).