[1] Hosp Clin Univ Juan Ramon Jimenez, Dept Biochem, C EBLM SEQC ML, Huelva, Spain
[2] Hosp Univ Lozano Blesa, Dept Biochem, C EBLM SEQC ML, Zaragoza, Spain
[3] IDIBAPS, Hosp Clin, C EBLM SEQC ML, Dept Biochem & Mol Genet CDB, Barcelona, Spain
[4] Hosp Gen Univ Santa Lucia, Dept Clin Anal & Biochem, C EBLM SEQC ML, Cartagena, Spain
[5] Fundacio Hosp Esperit St, Dept Lab Med, C EBLM SEQC ML, Barcelona, Spain
[6] Son Espases Univ Hosp, IdISBa, C EBLM SEQC ML, Dept Lab Med, Palma De Mallorca, Spain
[7] Synlab Diagnost Glob, C EBLM SEQC ML, Seville, Spain
[8] Hosp Clin San Carlos, UCG Anal Clin, C EBLM SEQC ML, Madrid, Spain
[9] Univ Barcelona, MutuaTerrassa Univ Hosp, Res Fdn MutuaTerrassa, Comm Evidence Based Lab Med C EBLM SEQC ML, Terrassa, Spain
[10] Univ Barcelona, MutuaTerrassa Univ Hosp, Res Fdn MutuaTerrassa, IFCC,Res Unit, Terrassa, Spain