Open Electronic Competition With A Collection Of Written Sealed Bids With The Award Criterion The Most Economically Advantageous Bid -Based (Lower Price) Offer For Maintenance And Technical Support For The Implementation Of The Payroll - Staff & Amp; Public Health Nursing Nursing Nursing Unit Of Attica, Pedyy Of The 2Nd Ministry Of Finance, For One (1) Year Of Budget Expenditure 40.000,00 € (Including Vat)