Hart, James L.
Lang, Andrew C.
Leff, Asher C.
Longo, Paolo
Trevor, Colin
Twesten, Ray D.
Taheri, Mitra L.
Article History
Received: 6 April 2017
Accepted: 3 July 2017
First Online: 15 August 2017
Competing Interests
: P.L., C.T., and R.D.T. are employees of Gatan Inc., which developed and is marketing the K2 camera.