Source:http://linkedlifedata.com/resource/umls/id/C0008013
MSH: Chemical substances that attract or repel cells. The concept denotes especially those factors released as a result of tissue injury, microbial invasion, or immunologic activity, that attract LEUKOCYTES; MACROPHAGES; or other cells to the site of infection or insult.,CSP: any chemotactic factor that induces positive chemotaxis.