Methods: After preparing specimens of every stage of human developing teeth, immunohistochemical staining of nerve growth factor and its receptor was carried on.
方法：制备人牙齿发育各阶段标本，进行神经生长因子及其受体的免疫组化研究。
Study Design. In vitro studies of the effects of proinflammatory cytokines on the production of nerve growth factor (NGF) by human intervertebral disc (IVD) cells.
研究设计：对于致炎细胞因子刺激椎间盘细胞神经生长因子(NGF)作用的体外研究。
Study Design. In vitro studies of the effects of proinflammatory cytokines on the production of nerve growth factor (NGF) by human intervertebral disc (IVD) cells.
研究设计：对于致炎细胞因子刺激椎间盘细胞神经生长因子(NGF)作用的体外研究。
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