Links:
[1] http://fast.wistia.com/embed/iframe/abaae2233c?videoWidth=480&videoHeight=270&controlsVisibleOnLoad=true&autoPlay=true&popover=true&plugin[socialbar][version]=v1&plugin[socialbar][buttons]=twitter-googlePlus-facebook&plugin[socialbar][tweetText]=Former NHL Star Talks Concussions
[2] https://momsteam.com/health-safety/concussion-safety/general/second-impact-syndrome-signs-and-symptoms
[3] https://momsteam.com/health-safety/concussions-no-direct-blow-head-specific-impact-magnitude-required
[4] https://momsteam.com/battle-sports-science/battle-sports-science-joins-momsteam-as-sponsor-Impact-Indicator-awarded-seal-of-approval