Xi Yj 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 21 22 23 24 25 E19 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E21 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 E25 1 0 0 0 0 0 1 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 E36 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 1 1 1 1 1 1

Table 4: Binary table of connections concerning stomach diseases.