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. 2005 Aug 30;5:33. doi: 10.1186/1471-2431-5-33

Table 2.

Percentage of children who perfectly ranked individual pictures within each pictorial set. n = 22, 6–7 year olds, n = 56, 8–18 year olds.

Age group Effort Throat narrowing Chest tightness
6–7 22 39 43
8–18 66 73 91