Media type: E-Article Title: Endogenous opioid poisoning? Contributor: Symons, I E; Emson, P C; Farman, J V imprint: BMJ, 1982 Published in: BMJ Language: English DOI: 10.1136/bmj.284.6314.469-a ISSN: 0959-8138; 1468-5833 Keywords: General Earth and Planetary Sciences ; General Environmental Science ; General Medicine ; General Medicine Origination: Footnote: Access State: Open Access