Affiliation: | 1. Medical Biological Laboratory TNO, P.O. Box 45, 2280 AA, Rijswijk, The Netherlands 2. Department of Genetics, Agricultural University, De Dreijenlaan 2, 6703 HA, Wageningen, The Netherlands 3. DSM Research, CP-BOC, P.O. Box 18, 6160 MD, Geleen, The Netherlands
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