Hi Mark, I´ve uploaded the paper you´ve requested. About pentitol measurements, we always used the protocol described in the publication below. I´m not sure whether it is still performed in my old lab, but you could always contact them: Metabolic Unit, Dept. Clinical Chemistry, VU University medical centre, Amsterdam, The Netherlands.
G. Jansen, F.A. Muskiet, H. Schierbeek, R. Berger, S.W. van der,
Capillary gas chromatographic proWling of urinary, plasma and
erythrocyte sugars and polyols as their trimethylsilyl derivatives,
preceded by a simple and rapid prepuriWcation method, Clin.