I attended an adapted 3-day course from 25th to 27th April 2012. It will help me a lot in my future research work. I am a general surgeon and worked in clinics for about 8 years. I also performed animal experiments before, such as partial hepatectomy, intra portal vein transplantation, hepatocytes isolation. I could do these animal experiments, but I still had some questions. I needed to improve my skills in animal surgery to do them perfectly. I took my questions (and also my colleague’s questions) to René’s course. René taught me by himself. He has more than 30 years of experience in animal experiments and microsurgery. I realized that we could improve our animal experiments with the teacher’s instructions and make them more perfect. In a short period of time, we learned all kinds of tricks from him. I also learned some microsurgical techniques. I would like to suggest, that the M.D./ Ph.D. students or postdocs who want to learn and improve the animal experimentation skills should come to René. You will get an excellent course from him.