[1] Portuguese Inst Oncol, Mol Oncol & Virol, R Dr Antonio Bernardino de Almeida, P-4200072 Porto, Portugal
[2] Portuguese League Canc NRNorte, Res Dept, P-4200072 Porto, Portugal
[3] Fernando Pessoa Univ, Fac Hlth Sci, CEBIMED, P-4200150 Porto, Portugal
[4] Univ Porto, ICBAS, Abel Salazar Inst Biomed Sci, P-4200072 Porto, Portugal