Figure 1. Examples of article comments on BioMed Central.

The comments shown are for an article published in BMC Medicine [14]. Full names and affiliations are typically given and commenters also indicate conflicts of interest. Readers must also be logged in to comment. Note that conversations are not threaded—meaning that replies cannot be formally directed towards specific comments—though commenters sometimes indicate whether their comment pertains to a specific comment via the “re:” designation in the comment title.