Scientists studying long-term effects of the Gulf of Mexico oil spill are looking for 15,000 more people who worked on the cleanup, even for one day.
Nearly 25,000 people already have signed up for what the National Institute of Environmental Health Sciences says is the largest study ever of long-term effects in oil spill workers.
Lead researcher Dale Sandler tells The Courier that it's been hard to find people who helped with the cleanup, because many have moved and changed phone numbers.
Sandler is chief of the epidemiology branch at the National Institute of Environmental Health Sciences, which began recruiting workers for the study in March 2011, less than a year after the spill.
To participate in the Gulf Long-term Followup study, call the toll-free number, 1-855-644-4853, or visit the study website, nihgulfstudy.org.