But there are yet still other critics who say the “long-term” users weren’t long enough, that tumors require even more time to develop.

当然，仍有些反对派认为所谓的“长期”用户实际上户龄还不够长，而脑瘤的演变却要历经极其漫长的阶段。

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The study reported little or no risk of brain tumors for most long-term users of cell phones.

研究报告指出，发部分手机长期使用者很少甚至没有得脑肿瘤的风险。

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We still do not know about heavy users, long-term users, or children as users.

但对于重度用户，长期用户及儿童，我们还没有确定的结论。

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Furthermore, it has been noted that misclassification of subjects would have been minimal for long-term users.

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"If we start asking for information like pictures and videos, we're going to hurt our business long term because users won't trust us, " he said.

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Certain epidemiologic studies (mainly from a single group in Sweden) indicate an elevated risk of glioma (the most malignant type of brain cancer) in long-term users of cell phones.

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