He had several episodes of hyperglycemia requiring large doses of insulin.
 He has diabetic neuropathy
(ROOT (S (NP (PRP He)) (VP (VBD had) (NP (NP (NP (JJ several) (NNS episodes)) (PP (IN of) (NP (NN hyperglycemia)))) (VP (VBG requiring) (NP (NP (JJ large) (NNS doses)) (PP (IN of) (NP (NN insulin))))))) (. .)))
(ROOT (S (NP (PRP He)) (VP (VBZ has) (NP (JJ diabetic) (NN neuropathy)))))
( He ( ( had ( ( ( several episodes ) ( of hyperglycemia ) ) ( requiring ( ( large doses ) ( of insulin ) ) ) ) ) . ) )
( He ( has ( diabetic neuropathy ) ) )