SETTING and MATERIALS:Research was carried out in the Department of Oral Biolo gy, and Department of Nuclear Medicine of Xijing Hospital, Fourth Military Medical University.
地点和材料：实验地点在第四军医大学口腔生物学教研室和西京医院核医学科。
SETTING and MATERIALS:Research was carried out in the Department of Oral Biolo gy, and Department of Nuclear Medicine of Xijing Hospital, Fourth Military Medical University.
地点和材料：实验地点在第四军医大学口腔生物学教研室和西京医院核医学科。
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