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Quantifying the time-varying association between objectively measured physical activity and mortality in US older adults over a 12-year follow-up period: the NHANES 2003–2006 study ...

Correspondence to Dr Michael P Hengartner, Department of Applied Psychology, Zurich University of Applied Sciences, Zurich Switzerland; michaelpascal.hengartner{at}zhaw.ch Dr Adlington1 recently drew ...

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This electronic resource aims to provide physicians with fast and easy access to practical guidelines linked to the best available research evidence. It covers a wide range of medical conditions and ...

Correspondence to Dr Kerry Dwan, Centre for Reviews and Dissemination, University of York, York, UK; Kerry.dwan{at}york.ac.uk A systematic review identifies, appraises and synthesises all the ...

Correspondence to Dr Mark H Ebell, Department of Epidemiology and Biostatistics, College of Public Health, University of Georgia, 125 Miller Hall, UGA Health Sciences Campus, Athens, GA 30602, USA; ...

Correspondence to Dr Juan Victor Ariel Franco, Research Department, Instituto Universitario del Hospital Italiano de Buenos Aires, 1199 Buenos Aires, Argentina; juanfranco{at}bmj.com ...

Correspondence to Dr Hendrika J Luijendijk, General Practice and Elderly Care Medicine, University Medical Centre Groningen, Groningen 9713 GZ, The Netherlands; h.j.luijendijk{at}umcg.nl PICOs are ...

Correspondence to: Dr Ann E Stapleton Department of Medicine, University of Washington, 1959 NE Pacific, Box 356423, Seattle, WA 98195, USA; stapl{at}uw.edu ...