The U.S. National Institutes of Health (NIH) on Tuesday said that it would use $10 million from BP to start a multiyear study to look at the potential health effects from the oil spill in the Gulf of Mexico. The NIH has already designated another $10 million to begin the study, which will look at the health effects on clean-up workers from oil and dispersants, including respiratory, neurobehavioral, carcinogenic, and immune conditions. The study will also include mental health concerns and other spill-related problems such as job loss, family disruption and financial uncertainty. "It was clear to us that we need to begin immediately studying the health of the workers most directly involved in responding to this crisis," NIH director Doctor Francis Collins said in a statement. "The donation from BP will help speed our work with Centers for Disease Control and Prevention, Environmental Protection Agency and other federal agencies, academia, as well as state and local partners to carry out this important study." The U.S. government said on Saturday BP's ruptured oil well is secure with no threat of spewing crude. The Macondo well failed on April 20, leading to an explosion aboard the Deepwater Horizon drilling rig which killed 11 crew members. The well leaked over four million barrels of oil into the Gulf for nearly three months until BP sealed it by pumping in mud and cement from the top on August 5. "Clean-up workers are likely to be the most heavily exposed of all population groups in the Gulf Coast region," said Dale Sandler of the NIH's National Institute of Environmental Health Services, which will lead the study. "For example, we hope to recruit workers involved in oil burning, skimming and booming, equipment decontamination, wildlife cleanup, and also those with lower exposure such as shoreline clean-up workers."