Impact of Several Types of Stresses on Short-term Memory and Apoptosis in the Hippocampus of Rats oleh Bo-Kyun Kim, Il-Gyu Ko, Sung-Eun Kim, Chang-Ju Kim, Jee-Sang Yoon, Hyung-Hwan Baik, Byung-Kwan Jin, Choong-Yeol Lee, Sang-Bin Baek, Mal-Soon Shin