Open Process Electronic Tender Above The Limits For The Supply Of Coronary Endoprostheses With Cpv: 33184500-8 And Balloon Catheters With Cpv: 33141210-5, To Meet The Needs Of The Hemodynamic Laboratory Of The G.N.I. "C. Hatzikosta", For One (1) Year, With The Right To A Unilateral Two-Month Time Extension In Case Of Non-Exhaustion Of The Quantities