Back in Basel he focused his interests on biliary tract surgery. 12 years later he was named professor at the University of Basel and became one of the great figures of his time.
De regreso a su ciudad natal enfoca sus intereses a la cirugía del tracto biliar; transcurrieron 12 años para que fuera nombrado profesor de la Universidad de Bazel y se convirtiera en una de las grandes figuras de la época.