For decades, a doctor refused to charge patients who couldn't pay. When he couldn't pay, his patients came to his aid.

For decades, a doctor refused to charge patients who couldn’t pay. When he couldn’t pay, his patients came to his aid.

Baltimore — In one of Baltimore’s poorest neighborhoods is one of its richest doctors. Dr. Michael Zollicoffer, known affectionately by his patients as Dr. Z., is a 66-year-old private family practitioner who is rich not in money — he says he is pretty much broke — but flush with job satisfaction. “I just love people,”…

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