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Upcoming holiday closures 

Quest Patient Service Centers will be closed on Friday, July 3 and Saturday, July 4, 2026, in observance of Independence Day, and to give our frontline team the time to recharge. Don't let the holiday interrupt your care. Plan your visit today.

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The Effect of Fasting on Serum Asymmetric Dimethylarginine (ADMA) and Symmetric Dimethylarginine (SDMA): A Report from a Large Reference Laboratory