The Use of Traditional Chinese Medicine in Patients with Oral, Oropharynx, Nasopharynx, and Hypopharynx Cancers: A Retrospective Longitudinal Cohort Study in Taiwan oleh Eyal Ben-Arie PhD, Chanya Inprasit PhD, Bernice Lottering PhD, Hei-Tung Yip MS, Wen-Chao Ho PhD, Yu-Chen Lee PhD, Pei-Yu Kao MD