RT Article T1 Factors influencing helmet use, head injury, and hospitalization among children involved in skateboarding and snowboarding accidents JF The Permanente journal VO 21 A1 Sadeghian, Homa A2 Bazargan-Hejazi, Shahrzad A2 Lee, Steven L. A2 Rouch, Joshua A2 Huynh, Nhan A2 Nguyen, Brian LA English YR 2017 UL https://krimdok.uni-tuebingen.de/Record/1912554267 DO 10.7812/TPP/16-161