9月26日有一篇article和两篇letter上线，free letter是Epicardium-to-fat transition in injured heart http://www.nature.com/cr/journal/vaop/ncurrent/full/cr2014125a.html；OA letter是Large-field high-resolution two-photon digital scanned light-sheet microscopy http://www.nature.com/cr/journal/vaop/ncurrent/full/cr2014124a.html；还有一篇研究论文Plant homeodomain finger protein 2 promotes bone formation by demethylating and activating Runx2 for osteoblast differentiation http://www.nature.com/cr/journal/vaop/ncurrent/abs/cr2014127a.html