PTPRC and COVID-19–associated multisystem inflammatory syndrome in children: During this step, epithelial cell adhesion molecule (EpCAM) was used as a marker for 7 PIMS cases23, 26, 30, 32, 37, 39, 42 and CD45 was the one for all 8 NIMS cases25, 27, 31, 33, 34, 35, 36, 40.