What drugs are the standard of care in the us for multiple myeloma? what drugs are the standard of care in france, germany and canada? why differe

Complex: Too complex to answer definitively in 400 characters. 1) country differences depends on different forms of "fda" & often cost/value calculations in other countries. 2) "standard" is really standards (plural) of care, which depends on untreated/relapsed, bmt candidate (possibly), & individual considerations (eg renal fn, oral vs. Iv, age, lifestyle, etc). This complexity reflects rapid change.