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Wang WL, Sung YT, Sung FC, Lu TH, Kuo SC, Li CY.Wang WL, et al. Among authors: sung yt, sung fc.J Pediatr. 2008 Sep;153(3):333-8. doi: 10.1016/j.jpeds.2008.04.017. Epub 2008 May 27.J Pediatr. 2008.PMID: 18534212
Lin SY, Chen HC, Chang TH, Lee WE, Sung YT.Lin SY, et al. Among authors: sung yt.Behav Res Methods. 2019 Oct;51(5):2310-2336. doi: 10.3758/s13428-019-01208-2.Behav Res Methods. 2019.PMID: 31429062Free PMC article.