I doubt you'll find any information, and certainly no studies, that can really answer this question... It seems to me that it's unlikely. But that being said, if it did happen, there would be nothing to do about it after the fact. Meaning, if you got an answer to this question it wouldn't be helpful. You can assume it happened because of the PH's, or you can assume it just happened through nature. Either way, you're stuck with the facial asymmetries.