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22 The causes of aphthous ulcers are unknown, and may include systemic diseases, nutritional deficiencies, food allergies, genetic predisposition, immune disorders, medications and human immunodeficiency virus infection

Lastly, NNMT overexpression unregulated CDK2 and CDK6 expression and downregulated P15, P21, and P27 expression, contributing to the imbalance between CDK and CKI

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Histamine and saline were used as positive and negative controls, respectively

Early biomarker response and patient preferences to oral and intramuscular vitamin B12 substitution in primary care: a randomised parallel-group trial