NICO is a charming and sociable teenager from Argentina who loves fencing, singing in his school choir, and drawing cartoons. He rushes, smiling, to kiss my cheek whenever we meet, chatting animatedly about the drawings he has brought me. A few years older, Brooke is a friendly and witty young man who radiates positivity. He settles comfortably into a chair in my office, leisurely sipping a Coke and ready to try my latest battery of tests. He recently graduated from high school, and enjoys his job bagging groceries at a local supermarket.
They both look like ordinary teenagers, but peer…
