. 2015 Aug 14;4(3):e102. doi: 10.2196/resprot.3952
©Judy JW Ammerlaan, Lieske W Scholtus, Constance HC Drossaert, Harmieke van Os-Medendorp, Berent Prakken, Aike A Kruize, Johannes JW Bijlsma. Originally published in JMIR Research Protocols (http://www.researchprotocols.org), 14.08.2015.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Research Protocols, is properly cited. The complete bibliographic information, a link to the original publication on http://www.researchprotocols.org, as well as this copyright and license information must be included.