That is the conclusion reached by
Kun Yuan and Vi - Nhuan Le, both then behavioral scientists at RAND Corporation, a nonprofit think tank.
Not exact matches
The components of their product and the foods they've suggested are proven separately in numerous articles, human studies and books — see The Handbook of Probiotics and Prebiotics by
Yuan Kun Lee.
Yuan,
Kun and Vi - Nhuan Le, Estimating the Percentage of Students Who Were Tested on Cognitively Demanding Items Through the State Achievement Tests.