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Authors
Helmen, Zachary M.
Helm, Melissa C.
Helm, Joseph H.
Nielsen, Alexander
Kindel, Tammy
Higgins, Rana
Gould, Jon C. http://orcid.org/0000-0002-7038-6995
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Article History
First Online: 9 January 2018
Compliance with Ethical Standards
:
: JG is a consultant for Torax Medical. The remaining authors declare that they have no competing interests.
: For this type of study formal consent is not required.
: Does not apply.
