The Korean Journal of Internal Medicine

Original Article: Korean J Med. 1988;35(1):99-105.; 의학논평 : 폐색성폐질환에서 FEF 50% / FIF 50% 의 진단적 의의 (FEF 50% / FIF 50% Ratio in Obstructive Lung Diseases ); 유지홍, 강홍모, 김원동; Jee Hong Yoo, Hong Mo Kang, Won Dong Kim