CCND1 and plasma cell myeloma: In a later study from (UAMS), they defined 7 subgroups rather than 4, using samples from over 400 newly diagnosed myeloma patients and more specific genes such as c-MAF and MAFB, CCND1, CCND3, ASS, IL6R, MMSET, FGFR3, CCNB2, FRZB, and DKK1.