P. Spiegel

Controlled comparison of L-5-methyltetrahydrofolate versus folic acid for the treatment of hyperhomocysteinemia in hemodialysis patients.

Z. Massy, P. Jacques, L. Dworkin, 2000, Circulation.

[Osteomalacia as an apparently rare side effect of oral fumaric acid therapy. Secondary DeToni-Debré Fanconi syndrome in the adult].

P. Spiegel, L. Fliegner, 1992, Der Hautarzt; Zeitschrift fur Dermatologie, Venerologie, und verwandte Gebiete.