IL1RL1 and myocarditis: In addition to the aforementioned EMB-based bioindicators, there is growing evidence that a number of blood biomarkers, including high-sensitivity C-reactive protein, N-terminal pro-B-type natriuretic peptide, troponin T and soluble IL-1 receptor-like 1 (IL1RL1; also known as ST2), have been the focus of research in the context of myocarditis and inflammatory cardiomyopathy [4,34,82].