Publisher: Massachusetts Medical Society Country of Publication: United States NLM ID: 0255562 Publication Model: Print Cited Medium: Print ISSN: 0028-4793 (Print) Linking ISSN: 00284793 NLM ISO Abbreviation: N Engl J Med Subsets: MEDLINE
Publisher: British Medical Association Country of Publication: England NLM ID: 8900488 Publication Model: Print Cited Medium: Print ISSN: 0959-8138 (Print) Linking ISSN: 09598138 NLM ISO Abbreviation: BMJ Subsets: MEDLINE