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Frey, Urs; Brodbeck, Tanja; Majumdar, Arnab; Taylor, D Robin; Town, G Ian; Silverman, Michael; Suki, Béla (2005). Risk of severe asthma episodes predicted from fluctuation analysis of airway function. Nature, 438(7068), pp. 667-70. London: Macmillan Journals Ltd. 10.1038/nature04176
