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Food group consumption at baseline (■) and each post-baseline visit: week 4 (×); week 16 (=); week 32 (▒); week 48 (░). P values are from McNemar's test and controlled for multiple comparisons using step-down Bonferroni adjustment: * P < 0·05, ** P < 0·01, *** P ≤ 0·0001.
