[1] Natl Inst Dent & Craniofacial Res, Oral & Pharyngeal Canc Branch, NIH, Bethesda, MD 20892 USA
[2] Univ Buenos Aires, Fac Ciencias Exactas, Buenos Aires, DF, Argentina
[3] CNR, Ist Endocrinol & Oncol Sperimentale, I-80131 Naples, Italy
[4] Royal Melbourne Hosp, Walter & Eliza Hall Inst Med Res, Parkville, Vic 3050, Australia
[5] Kyoto Univ, Fac Med, Dept Pharmacol, Sakyo Ku, Kyoto 6068501, Japan