1 23 Breast Cancer Research and Treatment ISSN 0167-6806 Breast Cancer Res Treat DOI 10.1007/s10549-013-2680-1 Use of complementary and alternative medicine (CAM) and changes in depressive symptoms from 3 to 15 months after surgery for primary breast cancer: results from a nationwide cohort study Christina Gundgaard Pedersen, Søren Christensen, Anders Bonde Jensen & Robert Zachariae