PTPRC and myocarditis: We found total immune cells (CD45, p < 0.0001), complement receptor 3 activated myeloid cells (CD11b, p < 0.0001), and macrophages (F4/80, p < 0.0001) were increased in males with myocarditis compared to females with myocarditis (Fig. 1c-h), as expected [16].