* [https://www.theverge.com/2019/5/2/18526813/scooter-electric-injury-austin-cdc-study-head-helmet Electric scooter use results in 20 injuries per 100,000 trips, CDC finds] | * [https://www.theverge.com/2019/5/2/18526813/scooter-electric-injury-austin-cdc-study-head-helmet Electric scooter use results in 20 injuries per 100,000 trips, CDC finds] |