1. Latvian Institute of Organic Synthesis; Aizkraukles Street 21 LV-1006 Riga Latvia
2. Latvia State Institute of Fruit-Growing; Graudu Street 1 LV-3701 Dobele Latvia
3. Riga Stradins University; Dzirciema Street 16 LV-1007 Riga Latvia
4. Institute of Food Safety; Animal Health and Environment BIOR; Lejupes Street 3 LV-1076 Riga Latvia