Forekomstfrekvensen steg til 32%, da der blev givet en ny behandlingskur, især hvor den ny behandlingskur overlappede den første, og beløb sig til 10% for dem, der modtog en tredje
The occurrence rate rose to 32% when a second course of therapy was given, especially in the areas where second treatment overlaps the first and amounted to 10% for those who received a third treatment course.