How to cite supplementary materials
Recent discussion with Information Specialists indicates a need to include guidance on how to cite supplementary materials. Supplementary materials can be extra material from the article (so would have the same authors, date, and underlying source, but would be designated as supplementary material) or they can be accompanying/linked materials (so may have different authors, title, date, etc).
Agreed by Style Manual leads
AdminJacob Riis (UX Lead, Cochrane) commented
Test comment, to be deleted
John Hilton commented
This may be a relevant section in Citing Medicine http://www.ncbi.nlm.nih.gov/books/NBK7282/#A32843