Methods The specimen that is not in threshold detected by counter were detected repeatedly by artificial counting.
方法采用仪器法和手工法，对用仪器法测定不在阈值范围内的标本，即改用手工法复检。
Methods The specimen that is not in threshold detected by counter were detected repeatedly by artificial counting.
方法采用仪器法和手工法，对用仪器法测定不在阈值范围内的标本，即改用手工法复检。
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