A method for routine quantitation of urinary 8-hydroxy-2′-deoxyguanosine based on solid-phase extraction and micro-high-performance liquid chromatography/electrospray ionization tandem mass spectrometry - Sabatini, L; Barbieri, A; Tosi, M; Roda, A; Violante, F S (Rapid Commun Mass Spectrom, 2005)