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. 2009 Oct 7;51(1):37. doi: 10.1186/1751-0147-51-37

Figure 8.

Figure 8

Trade between holdings, pigs. Trade between Swedish pig holdings during the period between July 1st 2005 and June 30th 2006, shown by the number of holdings that pigs have been sold to or purchased from. There were 1787 pig holdings that did not sell pigs and 1421 that did not purchase pigs during the period. There were 63 holdings that sold to more than 20 holdings and 115 that bought from more than 20 holdings.