EUROPEAN OPEN TENDER PROCEDURE, CONDUCTED ELECTRONICALLY BY AST ANCONA PURCHASING AND LOGISTICS DEPARTMENT, ACTING AS THE AGGREGATING ENTITY, FOR THE CONCLUSION OF FRAMEWORK AGREEMENTS PURSUANT TO ARTICLE 59, PARAGRAPH 4, LETTER A) OF THE CODE, FOR THE SUPPLY OF SURGICAL MESHES AND BIOLOGICAL IMPLANTS TO MEET THE NEEDS OF THE HEALTHCARE FACILITIES OF THE MARCHE REGION.