Mesenchymal stroma cells trigger early attraction of M1 macrophages and endothelial cells into fibrin hydrogels, stimulating long bone healing without long-term engraftment - Seebach, Elisabeth; Freischmidt, Holger; Holschbach, Jeannine; Fellenberg, Jörg; Richter, Wiltrud (Acta biomaterialia, 2014)