Antioxidative Propolis From Stingless Bees (Heterotrigona Itama) Preserves EndotheliumDependent Aortic Relaxation of Diabetic Rats: The Role of Nitric Oxide and Cyclic Guanosine Monophosphate. Braz. J. Pharm. Sci. 2022;57. doi:10.1590/s2175-97902020000419187