I was able to get one for my head once on the same day. One of the symptoms must have raised some major red flags, I guess. This was in Heidelberg, they have a

I was able to get one for my head once on the same day. One of the symptoms must have raised some major red flags, I guess. This was in Heidelberg, they have a huge medschool. For my knees I waited for weeks, if not months, though.