He denies fever, nausea, vomiting, light headedness, syncope, diarrhea, abdominal discomfort. .
 No gastroenteritis
(ROOT (S (NP (PRP He)) (VP (VBZ denies) (NP (NP (NN fever)) (, ,) (NP (NN nausea)) (, ,) (NP (VBG vomiting) (, ,) (NP (JJ light) (NN headedness)) (, ,) (NP (NN syncope)) (, ,) (NP (NN diarrhea)) (, ,) (NP (JJ abdominal) (NN discomfort)) (. .)))) (. .)))
(ROOT (NP (DT No) (NN gastroenteritis)))
( He ( ( denies ( ( ( ( fever , ) nausea ) , ) ( vomiting ( , ( ( ( ( ( ( ( ( light headedness ) , ) syncope ) , ) diarrhea ) , ) ( abdominal discomfort ) ) . ) ) ) ) ) . ) )
( No gastroenteritis )