Won Seok Heo, Hyun Wook Baik, Ju Hee Kang, Ju Sang Park, Sang Jong Park, Eun Jeong Jang, Sang Woon Park, Sang Jung Kim, Byung Sung Koh, Gi Tark Noh, Kyung Han Lee, Jung Ah Choi
J Korean Geriatr Soc. 2015;19(4):235-240. Published online December 31, 2015