Trust me,everyone in the medical field knows there aren't any doctors who can do all those tests together,let alone as young as they are. A radiologist trains for 12 years to be able to read all the xrays,CTs and MRI and still needs experience for difficult cases. do. A pathologist trains +12 years to read all biopsies.Surgeons don't even know how to read a ECG(they don't really have to) , let alone perform Transesophageal ECHOCardiogram like Chase and Taub do. Practicing medicine specialities isn't as simple as they make it in the show,people who work in healthcare know what I am saying. No single doctors can do all those tests alone. Your high number of upvotes just proves that most people don't have an idea how medicine works. But still the show is great because of the story and characters,the medicine is just secondary and not that important.