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Lee, Juhyun; Park, Sangmin; Choi, Kyunghyun; Kwon, Soon-man
FAMILY MEDICINE Vol.42 No.9, pp. 628-635
Choi, Kyung-Hyun; Park, Sang-Min; Lee, Ju-Hyun; Kwon, Soonman
JOURNAL OF KOREAN MEDICAL SCIENCE Vol.27 No.2, pp. 120-127