Source:http://linkedlifedata.com/resource/umls/id/C0026630
CSP: group of 2 viruses, MSV(Harvey) and MSV(Moloney); MSV(M) causes a rhabdomysarcoma.,MSH: A group of replication-defective viruses, in the genus GAMMARETROVIRUS, which are capable of transforming cells, but which replicate and produce tumors only in the presence of Murine leukemia viruses (LEUKEMIA VIRUS, MURINE).