Tapaus-verrokkitutkimus (Finnish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Tapaus-verrokkitutkimus" in Finnish language version.

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1web.archive.org

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ehib.org

What is a case-control study? ehib.org. Environmental Health Investigations Branch, Kalifornia. Arkistoitu 17.10.2007. Viitattu 15.12.2009. (englanniksi)

iwh.on.ca

Cohort studies, case control studies and randomized controlled trials Institute of work and health www-material. IWH. Viitattu 22.4.2014. (englanniksi)

nih.gov

ncbi.nlm.nih.gov

Doll R., Hill A. B.: Smoking and carcinoma of the lung. Preliminary report.. British Medical Journal, 1950, nro 2, s. 39–748. Artikkelin verkkoversio (pdf).
Doll R., Hill A. B.: A study of the aetiology of carcinoma of the lung. British Medical Journal, 1952, nro 2, s. 1271–1286. Artikkelin verkkoversio (pdf).

uef.fi

wanda.uef.fi

Epidemiologia Ympäristöterveyden www-materiaali. Kuopion yliopisto. Viitattu 5.12.2009.

web.archive.org

What is a case-control study? ehib.org. Environmental Health Investigations Branch, Kalifornia. Arkistoitu 17.10.2007. Viitattu 15.12.2009. (englanniksi)