"... I went to medical school before I became a mother. I had my oldest son as a fourth-year medical student. And so, when I was an intern, he was a baby. I had my daughter in the middle of my residency. And then my youngest son in my first year of private practice. And throughout my career, what I decided to do had everything to do with my own kids ... because the surprising thing that I learned is that what you do with children as a pediatrician is just a little bit in your office. What you really need to do is change the world around where they live day-to-day ... if you're going to improve their health."