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. 2009 Nov 23;4(11):e7962. doi: 10.1371/journal.pone.0007962

Figure 4. Distribution of AHC Illness Duration as Related to Family Cluster Size.

Figure 4

Onset duration tended to be shorter when cluster size was more than 3 family members. (1.2±1.7 days, range 0 to 6 days, vs. smaller cluster size 3.9±4.0 days, range 0 to 16 days, p<0.01).