Table 4 Algorithm of Calculating Co-occurrent DescriptorNames

FOR each P MID

   k = Number_of_DescriptorName(PMID)

   j = 1

   FOR DescriptorNames(i) (i =, 1, 2,..., k)

      DO while j ≤ k

         DescriptorNames Pair = DescriptorNames(i)+

            DescriptorNames (j)

         j = j + 1

         OUTPUT DescriptorName_Pair INTO

            table DM_pairs

      ENDDO

      j = 1

   ENDFOR

ENDFOR