The PI3K Inhibitor HCD Promotes Caspase Activation in Head and Neck Squamous Cells by Upregulating the Extrinsic and Intrinsic Apoptosis Pathways. - Chan LP; Tseng YP; Wang HC; Chien CY; Wu CW; Wang LF; Yen TW; Wang PC; Liaw CC; Liang CH (Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology, 2026)