Zulma Hinojosa waits anxiously in a doctor's office at La Paz's Children's Hospital for her 13-year-old son, who suffers from asthma and heart problems.

Zulma Hinojosa waits anxiously in a doctor's office at La Paz's Children's Hospital for her 13-year-old son, who suffers from asthma and heart problems.

LA PAZ: Zulma Hinojosa waits anxiously in a doctor’s office at La Paz’s Children’s Hospital for her 13-year-old son, who suffers from asthma and heart problems. Oxygen and…