_:b56781090 . _:b56781092 _:b56781093 . _:b56781090 . _:b56781092 . _:b56781093 "symptom frequency" . _:b56781091 "T079" . _:b56781091 "C0436350" . _:b56781090 _:b56781092 . _:b56781090 _:b56781091 . _:b56781090 . _:b56781090 "1"^^ . _:b56781093 .