Using physical education to promote out-of school physical activity in lower secondary school students - a randomized controlled trial protocol.
Juho PoletMary HassandraTaru LintunenArto LaukkanenNelli HankonenMirja HirvensaloTuija TammelinMartin S HaggerPublished in: BMC public health (2019)
ISRCTN39374060 . Registered 19.7.2018.