INVITED LECTURES
CHANGES IN THE RATIO BETWEEN OPERATIVE AND CONSERVATIVE TREATMENTS FOR PEPTIC ULCER AND ITS BASES
Yukio NAGAMACHI, Nobuo OGATA, Yasuji NISHIDA, Takuji NAKAMURA
Department of Surgery I, Gunma University School of Medicine
Jpn J Gastroenterol Surg 18: 2187-2191, 1985
Accepted
June 19, 1985
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