Methods1 DesignTo take cross-sectional longitudinal study with follow-up study of a combination of forward-looking approach.
研究方法1设计方案采取横断面纵向研究与前瞻性随访研究相结合的方法。
Methods1 DesignTo take cross-sectional longitudinal study with follow-up study of a combination of forward-looking approach.
研究方法1设计方案采取横断面纵向研究与前瞻性随访研究相结合的方法。
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