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Clinical analysis of vitamin B12 deficiency mainly manifested by recurrent aphthous ulcers
MENG Wenxia,FENG Lu,ZI Yunling,JIANG Liyi,LI Juxiong,ZHOU Zhen
Journal of Prevention and Treatment for Stomatological Diseases . 2019, (6): 370 -374 .  DOI: 10.12016/j.issn.2096-1456.2019.06.006