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Twenty One

Known as: 21, Twenty-One 
A natural number greater than twenty and less than twenty-two and the quantity that it denotes.
National Institutes of Health

Papers overview

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2015
2015
Soy food and isoflavone intake and endometrial cancer risk: the Japan Public Health Center‐based prospective study
Compared with western populations, the consumption of soy foods among Japanese is very high and the incidence of endometrial… 
Highly Cited
1998
Highly Cited
1998
Structural analysis of Arabidopsis thaliana chromosome 5. V. Sequence features of the regions of 1,381,565 bp covered by twenty one physically assigned P1 and TAC clones.
The nucleotide sequences of 21 P1 and TAC clones which have been precisely localized to the fine physical map of the Arabidopsis… 
Highly Cited
1996
Highly Cited
1996
Total Hip Arthroplasty with the Charnley Prosthesis in Patients Fifty-five Years Old and Less. Fifteen to Twenty-one-Year Results*
Data on 240 primary Charnley total hip arthroplasties, performed in 211 patients from October 1968 to July 1974, were recorded… 
Highly Cited
1981
Highly Cited
1981
Herculine Barbin. Being the recently discovered memoirs of a nineteenth-century hermaphrodite
Highly Cited
1976
Highly Cited
1976
Life events before myocardial infarction.
One-hundred and-twenty-one men between the ages of 35 and 65 who had been admitted to a Coronary Care Unit were interviewed… 
Highly Cited
1973
Highly Cited
1973
Reconstruction for Medial Instability of the Knee: Technique And Results In Sixty Cases
Sixty patients were treated for medial instability by advancement of the medial collateral ligament and posteromedial capsule as… 
Review
1973
Review
1973
The role of anaerobic coryneforms on specific and non-specific immunological reactions. I. Effect on particle clearance and humoral and cell-mediated immunological responses.
A wide range of different strains of anaerobic coryneforms and classical propionibacteria have been surveyed for some of their… 
Review
1972
Review
1972
Cysts of the menisci of the knee
A review of a series of 249 consecutive meniscectomies reveals an overall incidence of cysts of the menisci of 20%. Trauma in… 
1969
1969
Effect of an intra-uterine device on conception and ovulation in the Rhesus monkey.
From January 1966 to January 1967 British researchers at the Birmingham University Medical School studied the effects of the IUD… 
Highly Cited
1966
Highly Cited
1966
Diabetes Mellitus in Rabbits Immunized with Insulin
Normal rabbits immunized with bovine insulin in adjuvant produce circulating autoantibodies that bind large amounts of endogenous…