Polymorphism of angiotensin I-converting enzyme gene is related to oral cancer and lymph node metastasis in male betel quid chewers - Liu, Yi-Tien; Lin, Li-Wen; Chen, Chih-Yu; Wang, Chao-Ping; Liu, Han-Pang; Houng, Jer-Yiing; Chung, Fu-Mei; Shieh, Tien-Yu (Oral Oncology, 2012)