_:vb50951580 . _:vb50951580 . _:vb50951580 "url:http://en.wikipedia.org/wiki/Porphyria"^^ . _:vb50951580 . _:vb50951580 "A porphyria that has_symptom abdominal pain, has_symptom neuropathy, has_symptom autonomic instability and has_symptom psychosis."^^ . _:vb50951580 . _:vb50951580 . _:vb50951580 "url:http://www.merckmanuals.com/professional/endocrine_and_metabolic_disorders/porphyrias/acute_porphyrias.html"^^ . _:vb50951580 .