Advantage of a higher position of the tracheostoma with glottic closure for preventing complications related to tracheostomy tube: a retrospective cohort study oleh Yuji Kanazawa, Yasuhisa Kurata, Miki Nagai, Kenji Inoue, Fumihito Nozaki, Atsushi Mori, Mariko Ishihara, Mioko Mori, Tomohiro Kumada, Minoru Shibata, Takeo Kato, Masako Nakai, Makoto Kano