Source:http://linkedlifedata.com/resource/umls/id/C0003096
CSP: phylum of metazoan invertebrates comprising the segmented worms, and including marine annelids (Polychaeta), freshwater annelids, earthworms (Oligochaeta), and Leeches.,MSH: A phylum of metazoan invertebrates comprising the segmented worms, and including marine annelids (POLYCHAETA), freshwater annelids, earthworms (OLIGOCHAETA), and LEECHES. Only the leeches are of medical interest. (Dorland, 27th ed)