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Table 1 ABO and secretor phenotypes in the TwinsUK dataset

From: ABO antigen and secretor statuses are not associated with gut microbiota composition in 1,500 twins

  Total Secretors Non-secretors Unknown
Female Male Female Male Female Male
A 606 405 35 137 14 12 3
AB 40 20 6 9 3 2 0
B 140 96 7 30 3 2 2
O 717 449 41 175 22 27 3
Total 1503 970 89 351 42 43 8