Srisuwatanasagul, K.; Sukjumlong, S.; Sirivaidyapong, S.; Pianchop, S. AN IMMUNOHISTOCHEMICAL STUDY OF THE PROGESTERONE RECEPTOR (PR) EXPRESSION IN PYOMETRA CASES AND NORMAL UTERI AT THE TIME OF DIOESTRUS IN THE BITCH. TJVM 2015, 35, 57-64.