Table 4.

Top-cited articles by searching keywords for all journals listed in the Science Citation Index Expanded database (list B): by article type and year of publication*

Article type	Year of publication: number of articles (references)
	1945–1975	1976–1981	1982–1987	1988–1993	1994–1999	2000–2005	2006–2011	Total (%)
Article					293 27	128		3 (6)
Review					431 85 101 102	3103 110 113	132	8 (16)
Practical Guidelines						125		1 (2)
Research	181	326 29 119	2108 112	780 90 92 105 106 109 116	933 88 89 94 97 98–100 111	1530 79 82,83 86 87,91 95 96 104 107 114 115 117 118	184	38 (76)
Total (%)	1 (2)	3 (6)	2 (4)	7 (14)	15 (30)	20 (40)	2 (4)	50 (100)

*The search was conducted on 27 May 2015. Articles with reference numbers^25–33 appeared in lists A and B but with different rankings.