Intratumoral microvessel density and p53 protein: Correlation with metastasis in head-and-neck squamous-cell carcinoma. - Gasparini,G.; Weidner,N.; Maluta,S.; Pozza,F.; Boracchi,P.; Mezzetti,M.; Testolin,A.; Bevilacqua,P. (Int J Cancer, 1993)