@article{Callaghan_2007, title={Guest Editorial}, volume={3}, url={https://online-journals.org/index.php/i-joe/article/view/464}, DOI={10.3991/ijoe.v3i4.464}, number={4}, journal={International Journal of Online and Biomedical Engineering (iJOE)}, author={Callaghan, Michael J.}, year={2007}, month={Nov.} }