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

Year Number of Results
1945 10
1946 28
1947 51
1948 44
1949 41
1950 55
1951 60
1952 57
1953 56
1954 61
1955 66
1956 65
1957 71
1958 77
1959 57
1960 65
1961 54
1962 75
1963 101
1964 188
1965 44
1966 7
1967 16
1968 19
1969 16
1970 31
1971 24
1972 35
1973 14
1974 19
1975 27
1976 22
1977 27
1978 44
1979 26
1980 42
1981 37
1982 22
1983 28
1984 21
1985 24
1986 19
1987 19
1988 26
1989 33
1990 25
1991 36
1992 24
1993 47
1994 30
1995 42
1996 36
1997 28
1998 33
1999 40
2000 37
2001 29
2002 31
2003 32
2004 38
2005 36
2006 42
2007 34
2008 42
2009 42
2010 55
2011 49
2012 29
2013 38
2014 48
2015 45
2016 44
2017 46
2018 48
2019 50
2020 46
2021 63
2022 49
2023 47
2024 14

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3,148 results

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Page 1
The ductus arteriosus and its closure.
Tynan M. Tynan M. N Engl J Med. 1993 Nov 18;329(21):1570-2. doi: 10.1056/NEJM199311183292111. N Engl J Med. 1993. PMID: 8413481 No abstract available.
Control of the ductus arteriosus.
Heymann MA, Rudolph AM. Heymann MA, et al. Physiol Rev. 1975 Jan;55(1):62-78. doi: 10.1152/physrev.1975.55.1.62. Physiol Rev. 1975. PMID: 1088992 Review.
3,148 results