References
- RothmanKJGreenlandSLashTLModern Epidemiology3rd edPhiladelphia, PALippincott Williams and Wilkins2008
- McMahonBTrichopoulosDEpidemiology. Principles and methods2nd edLondon, UKLittle, Brown and Co1996
- WeissNSClinical Epidemiology. The Study of the Outcome of Illness3rd edOxford, UKOxford University Press2006
- SackettDLStrausSERichardsonWSRosenbergWHaynesRBEvidence-based Medicine. How to Practice and Teach EBM2nd edEdinburgh, UKChurchill Livingstone2000
- SackettDLHaynesBRGuyattGHTugwellPClinical Epidemiology. A Basic Science for Clinical Medicine2nd edBoston, MALittle, Brown and Company1991
- PaulJClinical epidemiologyJ Clin Invest19381753954116694597
- FletcherRHFletcherSWClinical Epidemiology. The Essentials4th edPhiladelphia, PALippincott Williams and Wilkins2005
- FeinsteinARClinical Epidemiology. The Architecture of Clinical ResearchPhiladelphia, PAW.B. Saunders Company1985