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Russell KF, Liang Y, O'Gorman K, Johnson DW, Klassen TP (2011). Klassen, Terry P (ed.). "Glucocorticoids for croup". Cochrane Database Syst Rev. 1 (1): CD001955. doi:10.1002/14651858.CD001955.pub3. PMID21249651. Pemeliharaan CS1: Banyak nama: authors list (link)
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