The conversation between human and AI assistant.
[|Human|] Given a reference text about multiple myeloma, tell me the risk factors and the cause of the disease.
[|AI|] Although the cause of multiple myeloma is not known, risk factors for developing the disease are obesity, radiation exposure, family history, and exposure to certain chemicals.
[|Human|] 
Given a reference text about multiple myeloma, tell me the risk factors and the cause of the disease.