Have you received advanced training in field sobriety testing?

I have received advanced training in the area of field sobriety testing. I am nationally certified to give field sobriety tests. Approximately seven years ago, I did go to a three day seminary, primarily to be certified on giving field sobriety tests. We went through the horizontal gaze nystagmus, the nine step walk and turn and the one leg stand for a three day period on learning how to do those tests properly.