[1] Univ Basque Country, Dept Microbiol Immunol & Parasitol, Fac Med & Odontol, E-48080 Bilbao, Vizcaya, Spain
[2] Univ Basque Country, Dept Enfermeria 1, Lejona 48940, Vizcaya, Spain
[3] Hosp Cruces, Serv Hematol, Cruces 48903, Barakaldo, Spain
[4] Univ Basque Country, Fac Quim, Dept Quim Aplicada, San Sebastian 20018, Gipuzkoa, Spain