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Kim, D. K.; Yoo, Y.; Yu, J.; Choi, S. H.; Koh, Y. Y.
Acta Paediatr. 2006 Jan;95(1):56-61.
Kim, Do Kyun; Choi, Sun Hee; Yu, Jinho; Yoo, Young; Kim, Beyong Il; Koh, Young Yull
Pediatr Pulmonol. 2006 Jun;41(6):538-43.