REFERENCES
- Brandt, G. & Spitzer, F. Leber Magen Darm 1978, 8, 343–346
- Boyett, J. D. & Sullivan, J. F. Dig. Dis. 1970, 15, 797–802
- Burch, R. E., Hahn, H. K. J. & Sullivan, J. F. ch. 9, pp. 333–361 in L. W.Powel (ed.) Metals and the Liver. Marcel Dekker, Inc., New York and Basel, 1978
- Chvapil, M., Peng, U. M., Aronson, A. L. & Zukoski, C. J. Nutr. 1974, 104, 434–443
- Evenson, M. A. & Anderson, C. T., Jr. Clin. Chem. 1975, 21, 537–543
- Gupta, B. D. & Miglani, N. Indian J. Pediatr. 1977, 44, 341–342
- Kallai, L., Keler-Bacoka, M., Stojanovski-Burbanj, A., Korsic, M., Knezevic, S. & Hadzić, N. Schweiz. Med. Wschr. 1971, 101, 643–646
- Kilerich, S., Hey, H., Næstoft, J. & Christiansen, C. Scand. J. Gastroent. 1979, 14, 781–783
- Kiilerich, S., Næstoft, J., Christensen, M. S. & Christiansen, C. Clin. Chim. Acta, in press
- Lindeman, R. D., Baxter, D. J., Yunice, A. A. & Kraikipanitch, S. Amer. J. Med. Sci. 1978, 275, 17–31
- Menghini, G. New Engl. J. Med. 1970, 283, 582–585
- Sullivan, J. F. & Heaney, R. P. Amer. J. Clin. Nutr. 1970, 23, 170–177
- Thiers, R. E. & Vallee, B. L. J. Biol. Chem. 1957, 226, 911–920
- Vallee, B. L., Wacker, W. E. C., Bartholomay, A. F. & Hoch, F. L. New Engl. J. Med. 1957, 257, 1055–1065
- Walker, B. E., Dawson, J. B., Kelleher, J. & Losowsky, M. S. Gut 1973, 14, 943–948
- Weismann, K., Christensen, E. & Dreyer, V. Acta Med. Scand. 1979, 205, 361–366
- Weismann, K., Roed-Petersen, J., Hjorth, N. & Kopp, H. Int. J. Dermatol. 1976, 15, 757–761