1. Slovenian Institute of Hop Research and Brewing; Department of Agrochemistry and Brewing; Cesta Žalskega tabora 2 SI-3310 Žalec Slovenia
2. Technische Universität München; Centre of Life and Food Sciences Weihenstephan, Chair of Brewing and Beverage Technology; Weihenstephaner Steig 20 DE-85354 Freising Germany