Fig. 4

Flow chart of the randomized controlled trial for the analyses of the primary outcome measures. *Participants in the control group received the intervention after the first follow-up survey. A total of 4 participants in the control group did not complete the e-learning course due to concussion (n = 1), lack of time (n = 1), and unknown reason (n = 2). As such, these participants were not included in the analyses of the secondary outcome measures