NCT02481817

Who might be able to join this trial:

• You are 18 years of age or older
• You have a narrowing or abnormality in the lower part of your voice box/upper windpipe (an area called the subglottis)

Who may not be able to join:

• You are under 18 years of age
• You are not able to give your own consent to participate in the trial
• You have had a serious injury to your voice box or windpipe in the past
• You had a breathing tube placed down your throat, or a surgical airway opening in your neck (tracheotomy), within the last 2 years
• You have had major surgery on the front of your neck
• You have had radiation treatment to your neck
• You have had damage to your voice box or windpipe caused by swallowing a harmful chemical or by heat/burns
• You have been diagnosed with a condition where your immune system attacks your blood vessels (vasculitis) or your connective tissues (confirm with trial site)
• You have had a specific blood test come back positive for certain immune system markers called antinuclear cytoplasmic antibodies (confirm with trial site)

Important: Always verify eligibility with the trial site directly before applying.