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[147], 'injured': [151], 'single-bicycle': [154], 'crash,': [155], 'proportion': [158], 'decreased': [159], 'with': [160], 'age': [161, 198], '(0–6:': [162], '91%,': [163], '7–12:': [164], '84%,': [165], '13–17:': [166], '77%).': [167], 'Of': [168], 'AIS': [169, 248], 'injuries,': [171, 320], '8%': [172], '85%': [177], 'extremities': [182, 185], '(73%': [183], 'upper': [184, 324], '13%': [187], 'lower': [188, 266], 'extremities).': [189], 'Helmet': [190], 'relatively': [193], 'high': [194], 'up': [195], '10': [200], '(90%),': [201], 'after': [202], 'which': [203], 'it': [204], 'dropped.': [205], 'Helmets': [206], 'much': [208], 'less': [209], 'frequently': [210], 'used': [211], 'by': [212, 238, 252], 'teenagers': [213], '(14%),': [214], 'especially': [215, 310, 321], 'girls.': [216], 'Consistently,': [217], 'share': [219], 'increased': [223], 'as': [224], 'got': [227], 'older.': [228], 'Bicycle': [229], 'helmets': [230, 287], 'found': [232], 'reduce': [234, 289, 319], 'all': [235, 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