Open Procedure, Pursuant To Art. 71 Of Legislative Decree 36/2023, To Be Carried Out Through The Use Of The Sardegnacat Telematic Platform, Aimed At The Five-Year Supply, Under Service, Of Automated Systems For The Diagnosis Of Autoimmune Diseases With Ifa, Clia Or Feia, Immunoblot And Elisa Methods Divided Into Three Lots, For The Needs Of The Sc. Single Laboratory Of Clinical Analysis Chi