1. Individuals referred to the NIH with a possible diagnosis of FMF, TRAPS, HIDS, MWS, FCAS, NOMID, DIRA, PAPA, PFAPA, or other unexplained febrile or inflammatory illnesses. Individuals may be seen for initial evaluation, genetic studies, and research blood specimens, or may send blood or saliva samples for genetic testing only. However, we place the following age restrictions on other studies: