Each gold dot is a US city. The navy dots are the 199 Children's Oncology Group (COG) specialty treatment centers — home to most of the country's pediatric cancer clinical trials and sub-specialty expertise. Use the filter pills to narrow by city size.
States are shaded by the share of children whose nearest specialty center is in another state — the deeper the shade, the more families must cross state lines for treatment.
"About 1 in 12 American children diagnosed with cancer must cross state lines to reach the nearest specialty treatment center. In Montana and Wyoming, that figure is 100%."