Clinical effectiveness of usual care with or without antidepressant medication for primary care patients with minor or mild-major depression: a randomized equivalence trialHermens, M.L.Hout, H.P.Terluin, B.Ader, H.J.Penninx, B.W.J.H.Marwijk, van H.W.J.Bosmans, J.E.Dyck, van R.Haan, de M.http://hdl.handle.net/1871/20495nulljournalArticle