Marco Gobbetti is full professor of Food Microbiology at the Faculty of Science and Technology of the University of Bolzano. He is author of more than 400 articles, all published in international journals. His H index is 90, with more than 25,000 citations. Sourdough microbiology is one of the main topics of his research. Michael Gänzle is full professor and Canada Research Chair in Food Microbiology and Probiotics at the Department of Agricultural, Food and Nutritional Science of the University of Alberta. The microbial ecology of cereal fermentations and the influence of fermentation on bread quality are a major focus of his research program.