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Once or Twice Response

Known as: Once or Twice 
An indication that something occurs or occurred once or twice.
National Institutes of Health

Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
Highly Cited
2008
Highly Cited
2008
BACKGROUND CC chemokine receptor 5 antagonists are a new class of antiretroviral agents. METHODS We conducted two double-blind… Expand
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Highly Cited
2006
Highly Cited
2006
BACKGROUND The combination of short-acting beta(2)-agonists and anticholinergics in the treatment of COPD has been well… Expand
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Highly Cited
2004
Highly Cited
2004
BackgroundThe increasing prevalence of morbid obesity together with the development of laparoscopic approaches has led to a steep… Expand
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Review
2003
Review
2003
Pregnancy, mostly because of the mitochondria-rich placenta, is a condition that favors oxidative stress. Transitional metals… Expand
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Highly Cited
1999
Highly Cited
1999
Research on spoken word production has been approached from two angles. In one research tradition, the analysis of spontaneous or… Expand
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Highly Cited
1999
Highly Cited
1999
OBJECTIVE To determine the effect of frequency of resistive training on gain in muscle strength and neuromuscular performance in… Expand
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Highly Cited
1989
Highly Cited
1989
IMR-90 normal human diploid fibroblasts, transfected with a steroid inducible mouse mammary tumor virus-driven simian virus 40 T… Expand
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Highly Cited
1987
Highly Cited
1987
  • A. Chao
  • Biometrics
  • 1987
  • Corpus ID: 41531908
A point estimator and its associated confidence interval for the size of a closed population are proposed under models that… Expand
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Highly Cited
1985
Highly Cited
1985
A model is presented in which a large population in mutation/drift equilibrium undergoes a severe restriction in size and… Expand
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Highly Cited
1960
Highly Cited
1960
The relative importance in geomorphic processes of extreme or catastrophic events and more frequent events of smaller magnitude… Expand
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