Negotiated Procedure Without A Call, Pursuant To Art. 50 Co.1 Lett E) And 108, Paragraph 3. Of Legislative Decree 36/2023 For The Assignment Of The Support Service To The Completion Of Competitions And Public Notices For Various Professional Figures Indicated In The Hiring Plan 2024-2025 Of The "John Paul Ii" Cancer Institute I.R.C.C.S.