Physical contact with  the ground is good for your health.
Department of Biology, University of Oslo, Norway. mysterud@bio.uio.no
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Mysterud
D002908:Chronic Disease / Q000628:therapy; D000529:Complementary Therapies; D018534:Earth, Planet; D004583:Electrons; D055593:Geological Phenomena; D006304:Health Status; D006801:Humans; D012890:Sleep