Another genetic illness that is rare but known to the breed is hypertrophic cardiomyopathy, which is a cardiac condition usually found between the ages of 2 - 6, with males being affected more commonly and more severely than females. In the Maine Coon, HCM is thought to be an autosomal dominant gene and researchers are working to identify markers for this disease. However, in the Turkish Angora, the disease has not yet been studied at length primarily due to its rarity of occurrence, and is likely to result from a different mutation of genes, with a different gene location than that of the Maine Coon cat. HCM also affects many other breeds, including Ragdolls, Persians and Bengals.