@article{Barber2016,
author = {Barber, J. S. and Kusunoki, Y. and Gatny, H. and Schulz, P.},
title= {Participation in an intensive longitudinal study with weekly web surveys over 2.5 years},
year = {2016},
doi = {10.2196/jmir.5422},
volume = {18},
number = {6},
}