XPNPEP1 and myocarditis: The corresponding peptides (20 m/z values) of eight proteins (GRP78, ACTA, H13, H4, MYH6, PGAM2, SAMP, TPM1) are decreased in EMB from patients with HHV6 in contrast to patients with HHV6 and myocarditis, as shown in Supplementary Figure S1.