HPV related HNC in Taiwan HPV+ HNC 6.9 tonsil 8.2 men 7.5 Age 40-50 8 HPV- HNC 5.0 APC Annual percentage change P<0.0001 P<0.0001 P<0.0001 P<0.0001 P<0.0001 Tzer-Zen Hwang et al. Int. J. Cancer 2015 Kansy,et al. Cancer Res. 2017 Nov 7 42