TY - JOUR T1 - The Effect of Extension of the Head and Neck upon the Infrahyoid Respiratory Passage and the Supraclavicular Portion of the Human Trachea JF - Thorax JO - Thorax SP - 176 LP - 180 DO - 10.1136/thx.14.2.176 VL - 14 IS - 2 AU - R. S. Harris Y1 - 1959/06/01 UR - http://thorax.bmj.com/content/14/2/176.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -