And the idea grew in us to do a little historical work on the subject of minimally invasive varicose vein therapy, and so we began with the necessary research in the specialist literature. So we were all the more surprised when we discovered that the idea of ​​gluing wasn’t all that new. And now PD Lahl told – rather casually – that until 1968 he had also worked with glucose solutions. This is exactly what we found in our research and this is exactly what led us back to Ferdinand Sauerbruch. Admittedly, it was more of a coincidence, and admittedly, a very small star in the big sky of surgery, but still very interesting and belonging to the present day.