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. 2017 Dec 7;9(12):2544–2558. doi: 10.18632/aging.101340

Table 2B. Reproductive outcome for the Barshop SPF barrier colony and the conventional colony at SNPRC.

Litter Size
Colony Single Twin Triplet Quad Quintuplet
SPF Barrier 3 20 53 17 1
SNPRC 10 78 114 28 2