If you are lucky you can see De Leung for 5 minutes. He needs treatment for ADHD or maybe it’s just trying to maximize his billing for the day. Imagine someone who claims to be a GI specialist and telling g a patient with new onset of constant burping, no big deal, it’s just air. Turns out new onset of constant burping and reflux is precursor to colon cancer. So disappointed with his lack of knowledge and treatment for food sensitivities and GI issues. Do t waste your money or time.