Rationale and design of PURE, a randomized controlled trial to evaluate Peritoneal Ultrafiltration with PolyCore™ in Refractory Congestive Heart Failure oleh Edoardo Gronda, Maurizio Gallieni, Giuseppe Pacileo, Giovambattista Capasso, Lee-Jen Wei, Francesco Trepiccione, Marco Heidempergher, Mario Bonomini, Marco Zimarino, José Carolino Divino-Filho, Lorenzo Di Liberato, Maria Michela Caracciolo, Valentina Masola, Tommaso Prosdocimi, Massimo Iacobelli, Caterina Vitagliano, Arduino Arduini