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Lenalidomide and dexamethasone ( RD ) is a standard of care for relapsed / refractory multiple myeloma ( RRMM ) , but there is limited published data on its efficacy and safety in the " real world " ( RW ) , according to the International Society of Pharmacoeconomics and Outcomes Research definition .
 Chemical: Lenalidomide; Chemical: dexamethasone; Chemical: RD; Disease: multiple myeloma; Disease: RRMM
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Lenalidomide; Chemical: dexamethasone; Chemical: RD; Disease: multiple myeloma; Disease: RRMM