Text and Data Mining valid from 2014-11-02
Received: 17 July 2014
Accepted: 23 September 2014
First Online: 2 November 2014
: R.N. and G.S. are employees of IBM; L.F. is an employee of Latham&Watkins; R.V. is an employee of Orca XL Problem Solvers; M.L.L. is an employee of Biogen Idec; L.W. and G.L. are employees of Sentrana.