Relationship to trimix dosage and penil scaring

Has there been any study done that shows an increase in penis scaring as you increase your dosage of bimix or trimix? It seems that the trimix dosage levels are all over the map so to speak.

Dr. John Mulhall says there is no evidence that shows scarring occurs from injection therapy as long as you

   a.) switch sides each time.

   b.) don’t inject more than 3 times a week.

   c.) push the needle straight in and pull it straight out without twisting or jerking.

 

The dose would not be a factor.