prednisone corticosteroids equivalent mg day doses dose systemic use chronic daily equivalent mg prednisone dose corticosteroids chronic corticosteroid steroids doses mg day prednisone equivalent kg steroid dose corticosteroid gvhd therapy doxorubicin cumulative mg epirubicin dose anthracycline exposure anthracyclines equivalent prior corticosteroids exceed intranasal physiological inhaled prednisone equivalent doses immunosuppressive corticosteroid steroids prednisone mg equivalent day doses systemic topical dose steroid corticosteroid use systemic prednisone therapy dose chronic mg prior condition dose prednisone corticosteroids steroids adrenal equivalent insufficiency chronic mg rheumatoid dexamethasone mg dose day equivalent days daily prior corticosteroid systemic