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. 2007 Sep 12;2(9):e887. doi: 10.1371/journal.pone.0000887

Figure 1. Age structures (%) of 354 females that died in the Skagerrak, Kattegat and the Baltic collected during the 1988 epidemic (white columns) compared with the age structure of the 1003 female seals collected in the Skagerrak, Kattegat , Baltic and the Danish Wadden Sea in 2002 (filled columns).

Figure 1

The age structure (AS) just prior to the 2002 epidemic (line) is indicated.