Efficacy of a Free-Play Intervention to Increase Physical Activity during Childcare: A Randomized Controlled Trial - Wolfenden, Luke; Jones, Jannah; Parmenter, Ben; Razak, Lubna Abdul; Wiggers, John; Morgan, Philip J.; Finch, Meghan; Sutherland, Rachel; Lecathelinais, Christophe; Clinton-McHarg, Tara; Gillham, Karen; Yoong, Sze Lin (Health Education Research, 2019)