Ultrafiltration and small solute transport at initiation of PD: Questioning the paradigm of peritoneal function - Selgas R; Bajo MA; Cirugeda A; del Peso G; Valdés J; Castro MJ; Sánchez S; Fernández-Reyes MJ; Hevia C; Gil F; Aguilera A; Ortiz J; et al. (Peritoneal Dialysis International, 2005)