Dr. Jennifer Rusiecki and her co-workers have just published a very strong study of nearly 9000 Coast Guard responders to the 2010 Deepwater Horizon Oil Spill in Occupational & Environmental Medicine. http://oem.bmj.com/content/early/2017/09/12/oemed-2017-104343
They found positive associations between crude oil exposure and various acute physical health symptoms among responders, as well as medium term health effects. Using follow-up surveillance, this cohort will be well positioned to evaluate longer-term effects of oil spill exposures using both self-reported and clinical health data.