This Contract Aims To Contract The Comprehensive Service Of Collection, Transport And Analysis Of Biomarkers In Patient Serum Samples To Achieve The Objectives Of The Colchiren Ici22/00006 Project, Whose Title Is “Efficacy Of Colchicine In Secondary Prevention Of Vascular Events And Renal Progression In Patients With Moderate Chronic Kidney Disease (Colchiren Study)”, Where The Principal Investigator (Pi) Is Dr. Mª De Los Ángeles Goicoechea Diezhandino, From The Service Of Nephrology At The Gregorio Marañón Hospital.