According to McNiven [26] at a Canadian genetics clinic, 83% of referrals for genetic testing for TMAU were deemed likely to instead have ORS
Citations Scientific references Raun K, Hansen BS, Johansen NL, Thgersen H, Madsen K, Ankersen M, Andersen PH
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Mannitol, with a cross-sectional hydrated diameter of 6.5 is a small solute that is used as a marker of total intestinal surface area available for absorption, whereas lactulose (with a larger cross-sectional diameter of 9.5 ) is used to assess the paracellular permeability through the tight junctions normalized to the total available intestinal surface [32], with results expressed as a ratio of the permeability of mannitol to lactulose