Working at nights could be bad for the heart. Study involved more than 240,000 nurses and determined that those who worked night shifts had a higher risk of developing coronary heart disease. The study also said that it is important to determine the "chrono type" of the employee during hiring.

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Working at nights could be bad for the heart. Study involved more than 240,000 nurses and determined that those who worked night shifts had a higher risk of developing coronary heart disease. The study also said that it is important to determine the "chrono type" of the employee during hiring.