Please direct message me for further details, but I gotta tell you...I just took the COHN-S and I studied for about 6 months for it. I studied the COHN review course materials from Annette Haag’s course. I also purchased every practice test ABOHN offered including all COHN tests and COHN-S tests. The materials covered probably 10-15 of the 160 questions on the test. Unbelievable!!!