id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ital-9595	Chu, Kuo-Chung; Lu, Hsin-Ke; Liu, Wen-I	Identifying Emerging Relationship in Healthcare Domain Journals via Citation Network Analysis	2018-03-19	13	.pdf	application/pdf	4250	204	52	Many other methods originate from citation analysis, including document co-citation analysis, bibliographic coupling,5 author co- citation analysis,6 and co-word analysis.7 There are levels of co-citation analysis: document, author, and journal. Intensive Care Med, BMJ 2 21 24 BMJ, N Engl J Med, JAMA 3 20 25 N Engl J Med, JAMA, Lancet 3 20 26 JAMA, Med Care, Lancet 3 14 27 JAMA, Med Care, N Engl J Med 3 14 28 BMJ, JAMA, Lancet, N Engl J Med 4 14 The link of co-citation journals in three periods from 1852 to 2009 can be summarized as follows: (1) three journals were highly cited but were not in a co-citation relationship in 1852–1907 (see figure 7); (2) five clusters of the healthcare journals in co-citation relationships were found for the years 1908–61 (see figure 8); and (3) 1962–2009 had a distinct cluster of four journals within the healthcare domain (see figure 9).	cache/ital-9595.pdf	txt/ital-9595.txt