Specialization is nothing new when it comes to doctors.
You've heard of cardiologists, oncologists, neurologists. And this speciality is growing so fast that this week a leading medical journal, the Annals of Internal Medicine, devoted eleven articles to the trend. To find out, Sheilah Kast followed one for a day. But for Dr. Herbert Friedman, the hospital 'is' his office. All of his patients are 'here,' all day long.