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Continue to ChatA digital microfluidic interface between solid-phase microextraction and liquid chromatography–mass spectrometry for determination of free concentration of steroids in urine - https://avesis.metu.edu.tr/yayin/ff8d141e-3e85-4c3b-9dd0-7f9be843ab91/a-digital-microfluidic-interface-between-solid-phase-microextraction-and-liquid-chromatographymass-spectrometry-for-determination-of-free-concentration-of-steroids-in-urine