Reply to Andreotti, Pafundi, Crea, Coluzzi, and Maseri

to the editor: Andreotti F et al. ([1][1]) suggest that endothelium-dependent release of NO may not fully explain the results reported in our study ([4][2]). We agree that Hb's carriage of NO in red blood cells and deoxyHb's release of NO probably play a role for explaining the difference in