. 2014 Oct 16;6(2):e187. doi: 10.5210/ojphi.v6i2.5470
This is an Open Access article. Authors own copyright of their
articles appearing in the Online Journal of Public Health Informatics. Readers
may copy articles without permission of the copyright owner(s), as long as the
author and OJPHI are acknowledged in the copy and the copy is used for
educational, not-for-profit purposes.