Simple and rationale-providing SMS reminders to promote accelerometer use: a within-trial randomised trial comparing persuasive messages.
Matti Toivo Juhani HeinoKeegan KnittleAri HaukkalaTommi VasankariNelli HankonenPublished in: BMC public health (2018)
DRKS DRKS00007721 . Registered 14.04.2015. Retrospectively registered.