1. Inst. de Biologia Experimental e Tecnológica; 2780-901 Oeiras Portugal
2. Inst. de Tecnologia Química e Biológica António Xavier; Univ. Nova de Lisboa; 2780-157 Oeiras Portugal
3. Nofima AS, the Norwegian Inst. of Food; Fisheries and Aquaculture Research; Ås Norway
4. Inst. of Animal Reproduction and Food Research; Polish Academy of Sciences; 10-748 Olsztyn Poland
5. Central Military Emergency Univ. Hospital “dr. Carol Davila”; Bucharest 010825 Romania
6. Faculty of Veterinary Medicine; Univ. of Agronomic Sciences and Veterinary Medicine of Bucharest; Bucharest Romania
7. Inst. of Microbiology of the Czech Academy of Sciences; Laboratory of Biotransformation; 14220 Prague Czech Republic
8. School of Food Science and Nutrition; Univ. of Leeds, Leeds; United Kingdom