I usually don’t bat an eye unless it says “Herr Dr. Professor”.
I usually don’t bat an eye unless it says “Herr Dr. Professor”.
“In my opinion, it’s a task in life to train oneself to speak as clearly as possible.” — Karl Popper
Some medical journals, such as those in the Lancet family of journals, require that full professors are distinguished this way in the author list. That’s probably what happened here.