The researchers studied blood samples of a total of 284 children aged between 20-40 months and found high levels of lead in 80% of the samples
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/recent-study-finds-high-levels-lead-children%E2%80%99s-blood
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/dhaka-tribune-dhaka
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lead
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/children
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/child-health
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangladesh
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia