Oxytocin, a missing link of the gut-brain axis between probiotics and chronic migraine?Comment on 'The effects of the multispecies probiotic mixture Ecologic®Barrier on migraine:results of an open-label pilot study'
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1 1 Massaschusetts General Hospital, Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Building 149, 13th Street, Charlestown, MA 02129, USA.