PT - JOURNAL ARTICLE ED - BMJ Publishing Group Ltd TI - Lighter balls for younger children AID - 10.1136/ip.9.4.311 DP - 2003 Dec 01 TA - Injury Prevention PG - 311--311 VI - 9 IP - 4 4099 - http://injuryprevention.bmj.com/content/9/4/311.short 4100 - http://injuryprevention.bmj.com/content/9/4/311.full SO - Inj Prev2003 Dec 01; 9