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. 2012 May 11;7(5):e35232. doi: 10.1371/journal.pone.0035232

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Lorenzi et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Paraffin serial sections of representative first trimester placenta (9^th week of gestation) from a voluntary termination of pregnancy. A subpopulation of Hofbauer cells, identified by CD68 (panel b), are positive for CD100 (panel a, red asterisks). Staining for CD72 (panel c) and CD45 (panel d) is largely negative. a,b,c,d: Bar = 60 µm.