| Datasets used in more than one study | Articles |
| 22 subjects (11 AD, 11 Nold) | 4 [80, 108–110] | 24 subjects (10 mild AD, 14 Nold) | 2 [91, 92] | 27 subjects (20 probable AD, 7 Nold) | 3 [104–106] | 28 subjects (14 probable AD, 14 Nold) | 3 [120–122] | 34 subjects (22 probable AD, 12 Nold) | 2 [112, 114] | 34 subjects (17 AD, 17 Nold) | 3 [77, 98, 111] | 48 subjects (17 early AD, 16 MCI, 15 Nold) | 4 [136–139] | 62 subjects (3 databases: (a) 17 mAD, 24 Nold; (b) 5 mAD and 5 Nold; (c) 8 mAD and 3 Nold) | 3 [78, 93, 101] | 74 subjects (74 MCI) | 9 [147, 152, 154, 156–160, 180] | 79 subjects (79 probable AD) | 4 [144–146, 162] | 220 subjects (120 AD, 100 Nold) | 2 [81, 115] |
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