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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1964 2
1979 6
1980 14
1981 12
1982 15
1983 34
1984 19
1985 38
1986 43
1987 42
1988 50
1989 46
1990 76
1991 92
1992 112
1993 134
1994 155
1995 211
1996 213
1997 264
1998 285
1999 334
2000 430
2001 467
2002 587
2003 753
2004 871
2005 1146
2006 1378
2007 1570
2008 1957
2009 2408
2010 2906
2011 3345
2012 3955
2013 4687
2014 5667
2015 6429
2016 6902
2017 7602
2018 8423
2019 9782
2020 11732
2021 2596
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78,473 results
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Page 1
Identifying Psychological Symptoms Based on Facial Movements.
Wang X, Wang Y, Zhou M, Li B, Liu X, Zhu T. Wang X, et al. Among authors: liu x. Front Psychiatry. 2020 Dec 15;11:607890. doi: 10.3389/fpsyt.2020.607890. eCollection 2020. Front Psychiatry. 2020. PMID: 33384632 Free PMC article.
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