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(a) Demonstration of the brain resemblance calculation, using k = 11, for YMR’s calendar age of 41 years. The blue scatter is from the control sample, and the orange dot shows YMR at 41. (b) The brain resemblance results, for seven different ks. The histogram of the calendar ages of the controls, on the back drop, shows the wide range of the age sample distribution, indicating that k-nearest neighbor search is not biased towards younger ages.
