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Lødrup Carlsen, Karin C; Roll, Stephanie; Carlsen, Kai-Håkon; Mowinckel, Petter; Wijga, Alet H; Brunekreef, Bert; Torrent, Maties; Roberts, Graham; Arshad, S Hasan; Kull, Inger; Krämer, Ursula; von Berg, Andrea; Eller, Esben; Høst, Arne; Kuehni, Claudia; Spycher, Ben; Sunyer, Jordi; Chen, Chih-Mei; Reich, Andreas; Asarnoj, Anna; ... (2012). Does pet ownership in infancy lead to asthma or allergy at school age? Pooled analysis of individual participant data from 11 European birth cohorts. PLoS ONE, 7(8), e43214. Lawrence, Kans.: Public Library of Science 10.1371/journal.pone.0043214
Witt, Claudia M; Bluth, Michael; Albrecht, Henning; Weisshuhn, Thorolf E R; Baumgartner, Stephan; Willich, Stefan N (2007). The in vitro evidence for an effect of high homeopathic potencies--a systematic review of the literature. Complementary therapies in medicine, 15(2), pp. 128-38. Exeter: Elsevier 10.1016/j.ctim.2007.01.011
