RT Journal Article SR Electronic T1 Indications for emergency tracheostomy. JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1194 OP 1195 VO 21 IS 12 A1 El-Mustafa, Osman M. YR 2000 UL http://smj.org.sa/content/21/12/1194.2.abstract AB