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Annals of Epidemiology > 2014 > 24 > 9 > 641-647.e1
Journal of Manipulative and Physiological Therapeutics > 2011 > 34 > 6 > 388-393
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz > 2006 > 49 > 11 > 1162-1168
Annals of Epidemiology > 2014 > 24 > 9 > 641-647.e1
Journal of Manipulative and Physiological Therapeutics > 2011 > 34 > 6 > 388-393
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz > 2006 > 49 > 11 > 1162-1168