12-Hour Time
12-Hour Time is a timekeeping system, belonging to the class of cyclic time notation methods, that divides the 24-hour day into two equally numbered periods of twelve hours each, distinguished by the use of indicators such as ante meridiem (a.m.) and post meridiem (p.m.) to specify morning and afternoon intervals.
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2017–2026
59
Variants
12-Hour Clock
Parents
372
Ruling out Acute Myocardial Infarction
Thomas H. Lee, G. Garcia Juarez, E. Francis Cook et al. · New England Journal of Medicine · 1991 · 265 citations
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University of Maryland, Baltimore
Baltimore, United States
6 h-index
17 publications
604 citations
Stanford University
Stanford, United States
5 h-index
15 publications
604 citations

University of Minnesota
Minneapolis, United States
5 h-index
9 publications
391 citations
University of Wisconsin–Madison
Madison, United States
5 h-index
14 publications
449 citations

Johns Hopkins University
Baltimore, United States
4 h-index
19 publications
2.2K citations

Washington State University
Pullman, United States
4 h-index
18 publications
823 citations
University of Pennsylvania
Philadelphia, United States
4 h-index
25 publications
1.6K citations
University of Copenhagen
Copenhagen, Denmark
4 h-index
20 publications
847 citations
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Repository · 50 publications · 1.5K citations
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AJVR · 7 publications · 251 citations
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JGR · 7 publications · 103 citations
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JNA · 6 publications · 263 citations
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