1WHO Collaberating Centre for Oral Precancerous Lesions. Definition of lenkoplakia and related lesions:an aid to studies on oral precancer[J]. Oral Surg, 1978,46: 518-539.
9WHO Collaborating Centre for Oral Precancerous Lesions. Definition of lenkoplakia and related lesions: an aid to studies on oral precancer[J]. Oral Surg, 1978,46:518-539.