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Referee Ken Anderson (R) stops Czech Republic's Matej Pekar (L) and Canada's Barrett Hayton during the IIHF World Junior Championships in Vancouver, Dec. 29, 2018. Canada won the preliminary match 5-1. (Xinhua/Andrew Soong)

Referee Ken Anderson (R) stops Czech Republic's Matej Pekar (L) and Canada's Barrett Hayton during the IIHF World Junior Championships in Vancouver, Dec. 29, 2018. Canada won the preliminary match 5-1. (Xinhua/Andrew Soong)