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Posted by rkeatinge on 07 Jul 2016 at 20:26 GMT

This appears to be a comparison of two cohorts. I'm not clear what was randomized, and I wonder if the word appears in error?

No competing interests declared.

RE: Randomization?

rrizzo replied to rkeatinge on 08 Jul 2016 at 09:02 GMT

We used randomization for the subject to be included in each cohort

No competing interests declared.