1. Laboratory of Food Technology, Dept. of Microbial and Molecular Systems (M2S), Leuven Food Science and Nutrition Research Center (LFoRCe)KU Leuven Kasteelpark Arenberg 22, Box 2457 3001 Heverlee Belgium
2. Inst. of Food Bioresources TechnologyDedan Kimathi Univ. of Technology Private Bag, Dedan Kimathi Nyeri Kenya