definiens: or means the prevention or treatment of any of the following diseases or conditions in humans o r animals : ( a ) myelofibrosis ( MF ) ; ( b ) chronic neut rophilic leukemia ( CNL ) ; ( c ) polycythemia vera ( PV ) ; ( d ) pri mary myelofibrosis, including prefibrotic, early st age or overt fibrotic stage ( PMF ) ; ( e ) essential thrombocy themia ( ET ) ; ( f ) chronic eosinophilic leukemia, not otherwise specified ( NOS ) ; ( g ) myeloproliferative neoplasms ( unclassifiable ) ; ( h ) 8p11 myeloproliferative syndro me ; ( i ) mastocytosis ; ( j ) chronic myelomonocytic leukemia ( CMML ) ; ( k ) juvenile myelomonocytic leukemia ( JMML ) ; ( l ) myelodysplastic syndrome / myeloproliferative n eoplasm with ring sideroblasts and thrombocytosis ( MDS / MPN - RS - T ) ; and ( m ) myelodysplastic syndrome / myeloproliferative neoplasm ( unclassifiable ), in ea ch case ( ( a)-(m ) ), as defined by reference to ICD10