to start with your question: there is no touristic package deal. You have to arrange everything yourself.
Dr. Vogl is an experienced surgeon, but we have some question marks. According to our findings dr. Vogl does not include scanning the azygos. I think that is a serious shortcoming.
Furthermore be sure you have an appointment as well with dr. Meyn. He is the man whom does the doppler scans. For some reason, the two drs have no shared agenda. So be sure you have two appointments at the same day (one for dr. Meyn, one for dr. Vogl).
Be sure in which building you have to be. The clinic a get together of several buildings that are wide spread over the site.
Dr. Vogl is a researcher. He is not interested in your stories to put it blundly. He searches for the problem and then he tries to fix it. Do not expect long explaining stories coming from his side.
Ask one question per email. In general, he does not give answer more than one line.
The address of dr. Meyn is:
Theodor Stern Kai 7
Tel : 069-6301 1