NEFROLOGÍA. Vol. XIX. Suplemento 4. 1999 CONTENTS · COUNCIL OF EUROPE CONSENSUS DOCUMENT: «MEETING THE ORGAN SHORTAGE» · ROYAL DECREE TO REGULATE ORGAN DONATION AND TRANSPLANTATION IN SPAIN SYMPOSIUM: «ADEQUACY ON HEMODIALYSIS: THE TIME FACTOR» · Debate on adequacy on hemodialysis: the time factor. Introduction and aims R. Selgas and G. Barril · Quality on dialysis. The Tassin experience G. Laurent · Adaptation of the vascular access to the different types of hemodialysis J. R. Polo · Daily ultrashort hemodialysis: the best system to get advantages from the high clearances U. Buoncristiani · Hemodialysis dose: a sine qua non condition for adequate hemodialysis F. Maduell · Adequacy on hemodialysis: the session duration. Changes in the clinical patterns of current patients F. Locatelli · Factors which may compensate the duration of the session to reach adequacy A. Martín-Malo · Prescribed hemodialysis time: does it guarantee adequacy? M. Fernández Lucas, J. L. Teruel, J. López Sánchez and J. Ortuño · Is high flux hemodialysis so bad? R. Pérez García · The importance of dry weight adjustment as the objective of adequacy on hemodialysis O. Ortega · 2-microglobulin in hemodialysis: an adequacy factor M. Macía and J. F. Navarro