Elevated Blood Lead Levels

• Michigan State University — East Lansing, Michigan, United States

• Universidad Iberoamericana A.C. — Mexico City, Mexico

• Beijing Children's Hospital, Capital Medical University — Beijing, Beijing Municipality, China
• Baoding children's hospital — Baoding, Hebei, China
• Children's Hospital of Heibei Province — Shijiazhuang, Hebei, China
• Xuzhou children's Hospital — Xuzhou, Jiangsu, China

Not specified