Krehl inspired Morawitz in his studies of blood-related pathology. In 1907 he completed a dissertation on blood circulation (for his Habilitation), and he was appointed in the same year as chief clinician of the University clinic at Freiburg im Breisgau.
Krehl influenced Morawitz's research on blood-related pathology. In 1907, he finished a dissertation on blood circulation (for his Habilitation), and was appointed as the chief clinician of the University clinic in Freiburg im Breisgau that same year.