BioMed Central publishes 30 society journals that are the official journals of various scientific societies. These societies represent fields such as sports nutrition, trauma and emergency medicine, podiatry, orthopedics, biological engineering, and rare diseases. Some journals were started new with BioMed Central, others were transferred from previous self-publication or other publishers. An example is the Journal of Experimental & Clinical Cancer Research which transferred to BioMed Central in 2008 after being previously self-published.