Effects of gonad -ectomy on prolactin and LH secretion and the pituitary-thyroid axis in male dogs - Günzel-Apel, AR; Seefeldt, A; Eschricht, FM; Urhausen, C; Kramer, S; Mischke, R; Hoppen, HO; Beyerbach, M; Koivisto, M; Dieleman, SJ (Theriogenology, 2009)