[1] Univ Navarra, Sch Med, Vasc Pathophysiol Unit, Fac Med, E-31080 Pamplona, Spain
[2] Univ Zaragoza, Sch Med, E-50009 Zaragoza, Spain
[3] Tufts Univ New England Med Ctr, Div Nephrol, Boston, MA 02111 USA
[4] Fdn Jimenez Diaz, Div Nephrol, Madrid, Spain
[5] Univ Autonoma Madrid, Sch Med, E-28049 Madrid, Spain
[6] 12 Octubre Univ Hosp, Div Nephrol, Madrid, Spain
[7] Univ Complutense, Sch Med, E-28040 Madrid, Spain
[8] Gregorio Maranon Univ Hosp, Dept Nephrol, Madrid, Spain
[9] High Council Sci Res, Biol Res Ctr, Madrid, Spain
[10] Policlin S Orsola, Malpighi Dept Nephrol, Bologna, Italy
[11] Univ Salamanca, Sch Med, Dept Physiol, E-37008 Salamanca, Spain
[12] Univ Alcala de Henares, Sch Med, Dept Physiol, Alcala De Henares, Spain