 Complete the following phrase:  Landrigans reputation rests largely on his role as a highly credible evidence-based advocate for public health, specifically in his focus on reducing the level of childrens exposure to lead and pesticides and for his participation in the World Health Organizations global campaign to eradicate smallpox. He was also a central figure in developing the National Childrens Study and in the medical and epidemiological studies that followed the destruction of the World Trade Center on 