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A flow of criteria to identify the start point of four-platform standing scale measurement. The abs and pairwise refer to the absolute difference and pairwise absolute difference, respectively. WWssp denotes the weaning weight at current suspected start point (ssp) and WWssp+i is the weaning weight at the following ith point of ssp, where i = 1 to 5. WWr is weaning weight recorded in chute system.
