<qa>  What is the permutated block randomization algorithm?Randomization: Participants will be randomly assigned, using permutated block randomization, to either the KD or PCD group with equal size. The CCTS BERD methodologists will develop the permuted block randomization algorithm. Because this is a diet intervention, it is not possible for participantsstudy personnel to be blinded to group assignment. In order to minimize biasensure allocation concealment, the randomization schedule will include sequentially-numbered, opaque sealed envelopes and will be kept by Dr. Morrison. 