[1] Univ Guadalajara Hlth Sci Ctr CUCS, Hosp Civil Guadalajara, Serv Nephrol, Hosp 278, Guadalajara 44280, Jalisco, Mexico
[2] Churchill Hosp, Oxford Kidney Unit, Oxford, England
[3] Churchill Hosp, Oxford Transplant Ctr, Oxford, England
[4] Univ Sydney, Westmead Hosp, Ctr Transplant & Renal Res, Westmead Millennium Inst, Westmead, NSW 2145, Australia