GPIHBP1 and pancreatitis: The plasma samples from the patients with unexplained hypertriglyceridemia and without mutations in LPL or GPIHBP1 at lipid clinics (n = 130), and six patients from unexplained hypertriglyceridemia, including three patients with systemic lupus erythematosus, were positive for GPIHBP1 autoantibodies, and they were complicated by severe hypertriglyceridemia and pancreatitis.