Health investigators in Ohio say their latest study into a child cancer cluster hasn't come up with any answers about what has sickened dozens of children over the last 15 years.
The Ohio Department of Health says the latest investigation sought to find if there are links among the victims
Since 1996, 35 children have been diagnosed and four have died from cancer in a 12-mile wide circle just south of Lake Erie about halfway between Cleveland and Toledo.
Many of the cases have been in the Sandusky County town of Clyde.
Health officials say 21 families agreed to answer questions about their homes, work and health histories.
The health department says the small number participating in the study makes it difficult to come up with any conclusions.
Investigators have spent more than three years sampling air and water around the cluster area.
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