Martin-Gimenez, T. de Blas, I. Aguilera-Tejero, E. Diez de Castro, E. Aguirre-Pascasio, C. Endocrine, morphometric, and ultrasonographic characterization of neck adiposity in Andalusian horses Domest. anim. endocrinol. 10.1016/j.domaniend.2016.02.003 2016 2016