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Severity: Notice

Message: Trying to access array offset on value of type null

Filename: models/Site_model.php

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Backtrace:

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Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
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疑難雜症萬事通 - 某流行病學家若想探討某個基因多型性是否會導致肺癌找了一組肺癌患者和一組正常人比較這兩組人該基因型之分布差異的研究方法此為何種流行病研究方法 - 前往 https://www.publichealth.org.tw/upload/files/108-公共衛生核心課程基本能力測驗-流行病學試題公告.pdf
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