title: Reply.
authors: Department of Radiology Mayo Clinic Rochester, Minnesota.
authors: A M
authors: http://orcid.org/0000-0001-7164-4127
authors: AM
authors: McGauvran
authors: Department of Radiology Mayo Clinic Rochester, Minnesota.
authors: A L
authors: http://orcid.org/0000-0003-0463-955X
authors: AL
authors: Kotsenas