the physicochemical nature of eosinophil chemotactic factor ( ecf ) was examined by using different maturation stages of eosinophils , namely eosinophils obtained from bone marrow ( bm-eo ) and those obtained from peritoneal cavity ( pec-eo ) , as the indicator of in vitro chemotaxis .
C0014467
eosinophils
C0005953
bone marrow