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Within-group difference for each subtype. Cognitive patterns of (a) C1, (b) C2, (c) C3, (d) C4, (e) C5, and (f) C6 are indicated. Error bars represent standard errors. VIQ: verbal IQ, PIQ: performance IQ, VC: verbal comprehension, PO: perceptual organization, FD: freedom from distractibility, and PS: processing speed.
