vii ABSTRACT DESCRIPTION OF KNOWLEDGE, ATTITUDE AND BEHAVIOR OF HEMOPHILIA PATIENTS AT ARIFIN ACHMAD HOSPITAL BASED ON THE COURSE OF THE DISEASE SYAHZALY INSANI PRATAMA Hemophilia is a congenital disease due to blood clots caused by mutations on the X chromosome. This disease is characterized by the functional activity of factor VIII or IX decreasing until it is absent. Hemophilia type A is…