Table 2: Automatic retrieval of grouped co-citations obtained manually in (Table 1). The first three columns in each row give the PMID of each publication involved in a rule and the final column gives the accuracies for the association rules in that row. For each set of three papers, there are three accuracies reported (last column), the first one is for rule paper 1 ==> paper 2, second accuracy is for paper 2 ==> paper 3 and third one is for paper 1 ==> paper 3. Paper 1,2,3 refers to the columns. Id's are PubMed Ids. The above three papers identified manually are highlighted in green: Group #1 2000 paper (10618382), Group #2 2001 paper (11427891), Group #3 2002 paper (11854495).