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The study concluded that using grain to inoculate wort could potentially be done so in a controlled manner, producing predictable and consistent results. It was stated that more studies need to be conducted to explore the vraiability in brewing process such as temperature and incubation times. For example, while the ''Weisella cibaria'' dominated at 110°F, it is reported that it doesn't tolerate temperatures above 113°F <ref name="blueowl_2017" />.
Various concerns on possible cross contamination associated with the methodology of the referenced study have been discussed with the authors on [https://www.facebook.com/groups/MilkTheFunk/permalink/1660708117290729/ this MTF thread].
See also: