. Author manuscript; available in PMC: 2015 Oct 19.
Published in final edited form as: Adv Pediatr Res. 2015 Apr 28;2(2015):10.12715/apr.2015.2.10. doi: 10.12715/apr.2015.2.10
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 2.
Recruitment and tracking of study participants