As lab results returned, the ED physicians had become concerned for impending sepsis given elevated wbc count and fever.
 The patient’s immune cells are elevated. 
(ROOT (S (SBAR (IN As) (S (NP (NN lab) (NNS results)) (VP (VBD returned)))) (, ,) (NP (DT the) (NNP ED) (NNS physicians)) (VP (VBD had) (VP (VBN become) (ADJP (JJ concerned) (PP (IN for) (S (VP (VP (VBG impending) (S (NP (NN sepsis)) (VP (VBN given) (NP (JJ elevated) (NN wbc) (NN count))))) (CC and) (NP (NN fever)))))))) (. .)))
(ROOT (S (NP (NP (DT The) (NN patient) (POS 's)) (JJ immune) (NNS cells)) (VP (VBP are) (ADJP (JJ elevated))) (. .)))
( ( As ( ( lab results ) returned ) ) ( , ( ( the ( ED physicians ) ) ( ( had ( become ( concerned ( for ( ( ( impending ( sepsis ( given ( elevated ( wbc count ) ) ) ) ) and ) fever ) ) ) ) ) . ) ) ) )
( ( ( The ( patient 's ) ) ( immune cells ) ) ( ( are elevated ) . ) )