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International Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition|January 1, 1980
[Investigation or oral substitution of iron and folic acid (author's transl)]K Pietrzik, D HötzelInternational Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition|January 1, 1978
[Biochemical and hematological measures for determination of folate status in humans. 2. Comparative determination of folate in blood and in erythrocytes]K Pietrzik, G Urban, D HötzelInternational Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition|January 1, 1975
[Influencing of acetylation and corticosterone biosynthesis through long-term pantothenic acid deficiency in rats]K Pietrzik, Ch Hesse, D HötzelInternational Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition|January 1, 1981
[Radiological investigations of cobalamin supply with regard to folate status (author's transl)]G Urban, K Pietrzik, D HötzelInternational Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition|January 1, 1980
[Biochemical and hematological parameters for the estimation of folate status in man. 3. Importance of formiminoglutamic acid excretion in the urine in comparison to other measurements]K Pietrzik, G Urban, D HötzelInternational Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition|January 1, 1978
[Biochemical and hematological measures for determination of folate status in humans. 1. Relation between serum folate and segmentation of neutrophil granulocytes]K Pietrzik, G Urban, D HötzelInternational Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition|January 1, 1975
[Urinary excretion of pantothenic acid as a measurement of nutritional requirements]K Pietrzik, C H Hesse, E S Zur Wiesch, et al.Clinical Research in Cardiology : Official Journal of the German Cardiac Society|October 3, 2006
[Homocysteine as a cardiovascular marker and risk factor]K PietrzikZeitschrift Fur Ernahrungswissenschaft|January 1, 1990
[The evaluation of "natural" sweeteners, especially concentrated fruit juices, syrups and honey]D HötzelEuropean Journal of Pediatrics|May 20, 1998
Vitamins B12, B6 and folate as determinants of homocysteine concentration in the healthy populationK Pietrzik, A BrönstrupPageof 7