Text and Data Mining valid from 2017-05-01
Received: 30 July 2016
Accepted: 30 March 2017
First Online: 10 May 2017
: L.V.W. and K.M. have a financial interest in Microphotoacoustics, Inc.; however, Microphotoacoustics, Inc. did not support this work. The other authors declare no competing financial interests.