What is wrong with the dyspeptic whose findings are all negative?
ALVEREZ
W C
WC
D003967:Diarrhea; D004064:Digestive System; D004066:Digestive System Diseases; D004194:Disease; D006801:Humans; D014780:Viruses
DIARRHEA/virus; DIGESTIVE SYSTEM/diseases; VIRUSES/diseases