Study on microbilogical contamination of feeding tubes used in oral and maxillofacial surgery - SHIGEMATSU, Yoshiaki; FUJITA, Kuniya; OSUGA, Tsutomu; SASAKI, Takako; SHIONOYA, Nobutoshi; HASHIMOTO, Takashi; OKADA, Munehisa; SUZUKI, Seiji; KINOSHITA, Fumio (Nihon Koku Geka Gakkai zasshi, 1995)