[1] Virgen Arrixaca Univ Hosp, Mucian Inst Biomed Invest, Transplant Unit, Gen Surg, Murcia, Spain
[2] Univ Murcia, Dept Surg Pediat Gynecol & Obstet, Sch Med, Murcia, Spain
[3] Univ Murcia, Fac Commun & Documentat, Murcia, Spain
[4] Univ Miguel Hernandez, Dept Stat Math & Informat, Elche, Spain