How to start and develop a multicenter, prospective, randomized, controlled trial Xavier Serra-Aracil; Mireia Pascua-Sol; Jesus Badia-Closa; Salvador Navarro-Soto;

Registration of a Research Project - Clinical Trial: Which, When, Where, and How Anna Nonell; Xavier Serra Aracil;

Protocolization of multicenter clinical studies in the digital era. Is useful data centralization by a data-manager? Antonio Ríos; José Antonio Puñal-Rodríguez; Pablo Moreno; Enrique Mercader-Cidoncha; Eduardo Ferrero-Herrero; Manuel Durán; Guadalupe Ruiz-Merino; José Ruiz-Pardo; José Manuel Rodríguez; Pedro Ramón Gutiérrez;