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Arshad SH, Karmaus W, Matthews S, Mealy B, Dean T, Frischer T, Tsitoura S, Bojarskas J, Kuehr J, Forster J; SPACE study group (Study of Prevention of Allergy in Children of Europe).Arshad SH, et al.J Investig Allergol Clin Immunol. 2001;11(2):94-102.J Investig Allergol Clin Immunol. 2001.PMID: 11642579Clinical Trial.