scientific article
author: Eija Laakkonen, Timo Törmäkangas, Dennis R. Taaffe, Urho Kujala, Sarianna Sipilä, Vuokko Kovanen, Sulin Cheng, Paula H A Ronkainen, Harri Suominen, Jukka Puolakka, Vidal Fey, Timo M Takala
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