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2. J. S. Fowler and A. P.Wolf, in ref. 1;
3. B. Långström , Y.Andersson, G.Antoni, S.Axelsson, P.Bjurling, K. J.Fasth, A. D.Gee, T.Kihlberg, J.Ulin and Y.Watanabe, Acta Radiologica, 1989, Supplementum 376, 31;
4. 11C-labeled octanal and benzaldehyde