The Purpose Of This Document Is To Define The Technical And Functional Characteristics For The Cro “Contract Research Organization” Service Contract For Carrying Out The Multicenter Research Study Coordinated By The Cardiology Service Of The Puerta De Hierro University Hospital Of Majadahonda For The Execution Of Project Pi25/00394, Granted By The Carlos Iii Health Institute (Isciii). The Contract Will Be Financed Entirely By Funds Obtained By The Carlos Iii Health Institute (Isciii), Project Pi25/00394.