Correction to: BMC Med

https://doi.org/10.1186/s12916-016-0553-2

The original article [1] contains a minor error whereby the dates for year of first launch and year of first report of adverse reaction for iophendylate in e-Appendix Table 1 are mistakenly presented as 1946 and 1975 respectively. The actual dates for these are 1944 and 1945 respectively. The correct version of e-Appendix Table 1 is shown in the Additional file 1. This Table should be taken into account over the version of e-Appendix Table 1 as shown in the original article [1].