IL6 and TNF receptor 1-associated periodic fever syndrome: The use of human menstrual blood stem cell–derived exosomes (MenSC‐Exos) to treat D‐GalN/LPS injection–induced fulminant hepatic failure (FHF) mouse models reduced circulating TNF‐α, IL‐6 and IL‐1β levels, improved liver function and ultimately reduced mortality in FHF mice.43