NPPB and COVID-19–associated multisystem inflammatory syndrome in children: A lack of inclusion of severely ill MIS-C patients in our study may have been responsible, as MIS-C is a hyperinflammatory syndrome with levels of albumin, CRP, D-dimer, ferritin, fibrinogen, lymphocyte count, and NT-pro-BNP being directly or indirectly affected by inflammatory mediators [59,60,61,62,63,64].