The scene where Perez runs through the hospital is a parody of a scene in the classic 80s film Ferris Bueller's Day Off. Both scenes used the same music, had the main character leaping in slow motion over an obstacle, and slowing down their frantic sprint for the sake of a good looking woman.
Nathan is diagnosed with Moyamoya Disease. Will Yun Lee's son was diagnosed with this a few years ago after being initially diagnosed with central nervous system vasculitis and going through chemo for nearly 18 months. He is doing very well.