MSCs in vitro differentiation after 2.856 GHz microwave exposure at SAR of 4 W/kg.

<p>(A) Osteogenic induction and adipogenic induction were detected with Von Kossa and Oil-Red-O staining. The induced chondrogenic pellets were placed onto a black ruler as indicated by the arrows. (B) Microscopic examination of induced osteoplasts (<i>left panel</i>), and adipocyted (<i>middle panel</i>) with Von Kossa and Oil-Red-O staining (scale bar = 100 μm), and chondrocytes (<i>right panel</i>) with H&E staining (scale bar = 50 μm).