As we previously discussed, I have communicated with the reviewer in question concerning the allegation raised in your initial communication of [date] (please see copy attached). I have now had a response from the reviewer which I would like to share with you for your comment.
[Describe the substance of the response or attach.]
Before I make a determination about these allegations and possible responses or remedies, I would very much appreciate your views and reactions.
[Adapted with permission from Elsevier]