Register-based data indicated nonparticipation bias in a health study among aging people

Olli Nummela, Tommi Sulander, Satu Helakorpi, Ilkka Haapola, Antti Uutela, Heikki Heinonen, Raisa Valve, Mikael Fogelholm

Journal of Clinical Epidemiology · 2011 · 58 citations · 21 references

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