Janetzki, Sylvia
Price, Leah
Schroeder, Helene
Britten, Cedrik M
Welters, Marij J P
Hoos, Axel
Article History
First Online: 25 June 2015
Competing interests
: S.J. is founder and president of ZellNet Consulting, Inc. L.P. is the founder and director of LBPrice Statistical Consulting, Ltd. All other authors declare no competing financial interests.