[1] UCL Med Sch, Cell Tissue & Organ Preservat Unit, Dept Surg, London NW3 2QG, England
[2] UCL Med Sch, Liver Transplant Unit, London NW3 2QG, England
[3] Univ Nacl Rosario, Ctr Binacl Argentina Italia Invest Criobiol Clin, RA-2000 Rosario, Santa Fe, Argentina
[4] Ukrainian Acad Sci, Dept Cryobiochem, Inst Problems Cryobiol & Cryomed, UA-310108 Kharkov, Ukraine