1. Laboratory for Analytical Chemistry; Department of Chemistry and Biochemistry; Faculty of Food Technology and Biotechnology; University of Zagreb; Zagreb Croatia
2. Department of Dermatology and Allergy; National Allergy Research Centre; Herlev and Gentofte Hospital; University of Copenhagen; Hellerup Denmark
3. Coronel Institute of Occupational Health; Amsterdam Public Health Research Institute; Academic Medical Center, University of Amsterdam; Amsterdam The Netherlands