 The morphologic subtypes of AML also include rare types not included in the FAB system , such as acute basophilic leukemia , which was proposed as a ninth subtype , M8 , in 1999 . 
 The morphologic subtypes of AML also include rare types not included in <a href='None' title='1'><mark>the</mark></a>FAB <a href='negative_concord' title='2'><mark>system</mark></a> , such as acute basophilic leukemia , which was proposed as a ninth subtype , M8 , in 1999 . 
The morphologic subtypes of AML also include rare types not included in FAB no system , such as acute basophilic leukemia , which was proposed as a ninth subtype , M8 , in 1999 .