Challenges for "National Blood Pressure Control Program": letters to the editor

Research-agenda Bias: letters to the editor

Letters to the Editor Carbon Dioxide Pressure-concentration Relationship in Arterial and Mixed Venous Blood

Sun, Xing-Guo, James E. Hansen, William W. Stringer, Hua Ting, and Karlman Wasserman Carbon dioxide pressure-concentration relationship in arterial and mixed venous blood during exercise. J Appl Physiol 90: 1798–1810, 2001.—To calculate cardiac output by the indirect Fick principle, CO2 concentrations (CCO2) of mixed venous (Cv#CO2) and arterial blood are commonly estimated from PCO2, based on ...

Letters Letter to the Editor

The good name of TEX One of the many wonderful things about TEX is that its behaviour is essentially the same, no matter where it runs. TEX is a fixed point, identical on all machines. The same goes for METAFONT and the Computer Modern fonts. The author of TEX, Donald Knuth, has made it perfectly clear that he does not object to anyone revising TEX(or METAFONT) just as long as the resulting pro...

Letters Letters n Editor:

“Fronti Nulla Fides”: No reliance can be placed on appearance. In a letter to the editor (AI Mugazine, Winter 1989), Benjamin Kuipers criticizes various points made in an earlier paper of ours (Akman and ten Hagen 1989). First, a side (nonetheless important) remark: Although Kuipers asserts that he distributes QSIM to interested researchers, our experience has been otherwise. Akman has tried tw...

LETTERS TO THE EDITOR Paracetamol and asthma

The study by Shaheen et al rightly pointed out that some patients with asthma deliberately avoid aspirin and are more likely to use paracetamol, hence a “consumer selection bias”. However, they failed to mention the “professional’s selection bias”. Any standard textbooks or prescribing references state that aspirin and other non-steroidal antiinflammatory drugs (NSAIDs) could potentially worsen...

Unjustified Restrictions on Letters to the Editor

Douglas G. Altman Editors of medical journals accept that published research should be open to comment and correction in published correspondence ([1]; Box 1). “Post-publication peer review” enables comments on, clarifi cations of, and corrections to published research. All journals should have a correspondence page for this purpose. I previously criticised the effective “statute of limitations...