You are better off preparing for the USMLE exams and passing them.
If you want to work out side of PR you will need the USMLE exams.
I think they had some problems with the revalida in PR and they were going to start using the USMLE exams. I REPEAT I THINK I READ IT.
If you just want to practice in PR, good for you and good luck on the exams.

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Some day I will be the next Goljan/Daugherty/fysher for IMG's all over the world.