39165656 clusters
Max cluster size: 20

Cluster Size Distribution
1	8213807
2	21301524
3	9646044
4	3168
5	662
6	289
7	94
8	35
9	17
10	8
11	5
12	2
20	1

Cluster Type Distribution
frozenset({('DOI', 6), ('PMC', 5), ('PMID', 1)})	1
frozenset({('DOI', 1), ('PMC', 10), ('PMID', 1)})	1
frozenset({('DOI', 6), ('PMC', 3), ('PMID', 1)})	1
frozenset({('DOI', 1), ('PMID', 1), ('PMC', 6)})	1
frozenset({('DOI', 5), ('PMC', 2), ('PMID', 1)})	1
frozenset({('PMC', 9), ('PMID', 1), ('DOI', 10)})	1
frozenset({('PMC', 8), ('DOI', 1), ('PMID', 1)})	1
frozenset({('PMC', 3), ('DOI', 2), ('PMID', 1)})	2
frozenset({('DOI', 6), ('PMC', 4), ('PMID', 1)})	2
frozenset({('PMC', 2), ('PMID', 1)})	3
frozenset({('DOI', 1), ('PMC', 4), ('PMID', 1)})	3
frozenset({('DOI', 5), ('PMC', 5), ('PMID', 1)})	3
frozenset({('PMC', 1), ('DOI', 4), ('PMID', 1)})	3
frozenset({('DOI', 5), ('PMC', 4), ('PMID', 1)})	6
frozenset({('PMC', 3), ('DOI', 1), ('PMID', 1)})	7
frozenset({('DOI', 5), ('PMC', 3), ('PMID', 1)})	8
frozenset({('PMC', 4), ('DOI', 4), ('PMID', 1)})	9
frozenset({('PMC', 2), ('DOI', 4), ('PMID', 1)})	15
frozenset({('PMC', 3), ('DOI', 4), ('PMID', 1)})	33
frozenset({('PMC', 3), ('DOI', 3), ('PMID', 1)})	79
frozenset({('PMC', 1), ('DOI', 3), ('PMID', 1)})	106
frozenset({('PMC', 2), ('DOI', 3), ('PMID', 1)})	281
frozenset({('PMC', 2), ('DOI', 1), ('PMID', 1)})	331
frozenset({('DOI', 2), ('PMID', 1)})	376
frozenset({('PMC', 2), ('DOI', 2), ('PMID', 1)})	549
frozenset({('PMC', 1), ('DOI', 2), ('PMID', 1)})	2837
frozenset({('PMC', 1), ('PMID', 1)})	712076
frozenset({('PMID', 1)})	8213807
frozenset({('PMC', 1), ('DOI', 1), ('PMID', 1)})	9645665
frozenset({('DOI', 1), ('PMID', 1)})	20589448