Betel Quid and Oral Potentially Malignant Disorders in a Periurban Township in Myanmar. oleh Ko-Ko Zaw, Mya Ohnmar, Moh-Moh Hlaing, Yin-Thet-Nu Oo, Swe-Swe Win, Maung-Maung-Than Htike, Phyu-Phyu Aye, Sein Shwe, Moe-Thida Htwe, Zaw-Moe Thein