Protective effect of helmet use on mortality in bicycle crashes in South Korea: a matched case–control study

• Je Sun YeonChungbuk National University
• Sang Chul KimChungbuk National University
• So Yeon KongLaerdal (Norway)
• Euijae KimDankook University
• Gwan Jin ParkChungbuk National University
• Young Min KimChungbuk National University
• Hyun Seok ChaiChungbuk National University
• Hoon KimChungbuk National University