研究人员交叉参考了另一个注册机构死亡注册原因的记录，所以他们能对这组前列腺癌病人计算出死亡的人数和对抗的死因。
The researchers cross-referenced the records to another register, the cause of death register, so they could calculate Numbers of deaths from prostate cancer in the cohort and competing causes.
“由于某种原因，我以为，哦，真该死，我将进行注册，”他说。
“For some reason I thought, Oh, sod it, I will sign up, ” he says.
用户会出于各种原因选择注册别名或者假名.
Users opt to register aliases and pseudonyms for different reasons.
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