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Table representation of search results timeline featuring number of search results per year.
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Number of Results
1970
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1972
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1973
19
1974
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1975
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1976
22
1977
8
1978
13
1979
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1980
17
1981
24
1982
17
1983
22
1984
33
1985
36
1986
33
1987
29
1988
24
1989
30
1990
40
1991
51
1992
47
1993
44
1994
55
1995
60
1996
65
1997
83
1998
93
1999
109
2000
124
2001
126
2002
123
2003
112
2004
148
2005
175
2006
140
2007
193
2008
214
2009
226
2010
239
2011
236
2012
273
2013
270
2014
300
2015
297
2016
296
2017
279
2018
289
2019
291
2020
366
2021
518
2022
662
2023
572
2024
279
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Page 1
Attention-deficit hyperactivity disorder.
Thapar AK, Thapar A.
Thapar AK, et al.
Br J Gen Pract. 2003 Mar;53(488):225-30.
Br J Gen Pract. 2003.
PMID: 14694701
Free PMC article.
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