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Patient Preparation
Avoid coffee, tea, tobacco or nicotine patch, bananas, citrus fruits prior to and during sample collection
Transport Condition and sample stability
Bring sample to the lab within three hours after collection in ambient temperature; in case of processed sample (e.g., for researchers, field collection) stable for 5 days at 2-8°C, and 1 month at -20°C if adjusted to pH 1-2.