CHICAGO—High eosinophil counts that can’t be explained should concern rheumatologists and spark attempts to identify what’s happening, an expert said at the ACR State-of-the-Art Clinical Symposium in April. “Eosinophil counts over 1,500 (per microliter) should provoke worry,” said Bruce Bochner, MD, professor of medicine in allergy and immunology at Northwestern University Feinberg School of Medicine…