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

Year Number of Results
1945 1
1946 2
1947 2
1948 9
1949 2
1952 3
1953 22
1954 60
1955 27
1956 11
1957 31
1958 28
1959 37
1960 71
1961 110
1962 78
1963 2
1964 3
1965 15
1966 137
1967 245
1968 288
1969 263
1970 373
1971 363
1972 370
1973 374
1974 436
1975 371
1976 322
1977 315
1978 278
1979 474
1980 384
1981 349
1982 406
1983 400
1984 396
1985 442
1986 460
1987 470
1988 464
1989 537
1990 556
1991 799
1992 914
1993 909
1994 965
1995 961
1996 937
1997 922
1998 1041
1999 1040
2000 1257
2001 1270
2002 1246
2003 1583
2004 1674
2005 1869
2006 1990
2007 2024
2008 2126
2009 2600
2010 3170
2011 3316
2012 3342
2013 3380
2014 3111
2015 2924
2016 2809
2017 2723
2018 2557
2019 2627
2020 9983
2021 9738
2022 1983
2023 762
2024 5609
2025 4130

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91,005 results

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Page 1
Respiratory tract infections and pneumonia.
McChlery S, Ramage G, Bagg J. McChlery S, et al. Periodontol 2000. 2009 Feb;49(1):151-65. doi: 10.1111/j.1600-0757.2008.00278.x. Periodontol 2000. 2009. PMID: 19152532 Free PMC article. Review. No abstract available.
Pneumonia in the tropics.
Lim TK, Siow WT. Lim TK, et al. Respirology. 2018 Jan;23(1):28-35. doi: 10.1111/resp.13137. Epub 2017 Aug 1. Respirology. 2018. PMID: 28763150 Free PMC article. Review.
Pharyngotonsillitis.
Stjernquist-Desatnik A, Orrling A. Stjernquist-Desatnik A, et al. Periodontol 2000. 2009 Feb;49(1):140-50. doi: 10.1111/j.1600-0757.2008.00282.x. Periodontol 2000. 2009. PMID: 19152531 Free PMC article. Review. No abstract available.
Viral-bacterial interactions in the respiratory tract.
Bellinghausen C, Rohde GGU, Savelkoul PHM, Wouters EFM, Stassen FRM. Bellinghausen C, et al. J Gen Virol. 2016 Dec;97(12):3089-3102. doi: 10.1099/jgv.0.000627. Epub 2016 Oct 18. J Gen Virol. 2016. PMID: 27902340 Review.
91,005 results
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