To systematically review the available evidence on eustachian tube balloon dilation for treating chronic ETD covering indications, efficacy, safety, short term, and long term outcomes, a literature search was conducted on Google Scholar and Pubmed. 
Google Scholar
To systematically review the available evidence on eustachian tube balloon dilation for treating chronic ETD covering indications, efficacy, safety, short term, and long term outcomes, a literature search was conducted on Google Scholar and Pubmed. 
Pubmed