History of myeloproliferative disorder.
 History of hematologic disorder
(ROOT (NP (NP (NP (NN History)) (PP (IN of) (NP (JJ myeloproliferative) (NN disorder)))) (. .)))
(ROOT (NP (NP (NN History)) (PP (IN of) (NP (JJ hematologic) (NN disorder)))))
( ( History ( of ( myeloproliferative disorder ) ) ) . )
( History ( of ( hematologic disorder ) ) )