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23. [Preliminary observations of local treatment of oral leukoplakia with retinoic acid (author's transl)]. Zhu YX. Zhonghua Kou Qiang Ke Za Zhi; 1979; 14(3):154-6. PubMed ID: 299045 [No Abstract] [Full Text] [Related]
24. [Clinical study of an aromatic retinoid (Ro 10-9359) for the treatment of oral hyperkeratosis]. Ehrl PA. Dtsch Zahnarztl Z; 1980 May; 35(5):554-8. PubMed ID: 7004844 [Abstract] [Full Text] [Related]