打外泌体会比干细胞更安全吗

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            <a style="text-align: right;float: left;width: 300px;" href="https://www.163.com/v/video/VLSC1VQHQ.html" target="_blank" class="video-title">打外泌体会排异吗？它比干细胞更安全？专家：别急着下结论</a>
            <span class="video-from" style="color: #a7a7a7;margin-left:10px">（来源：网易健康）</span>
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