Such studies might include experiments as T cell recognition of their peptides and generation of antibody or a T cell receptor that could cross-react to both of foreign and autologous epitopes or purifying the peptides from the MHC in cardiac sarcoidosis using biological samples of the patients with CS, such as bronchoalveolar lavage (BAL) cells or tissue from the heart in left ventricular assist device (LVAD) or heart transplantation procedures to determine the presence of the epitopes on MHC. Here, HLA-C is linked to Cowden syndrome 1.