Text and Data Mining valid from 2018-12-17
Received: 17 April 2018
Accepted: 30 October 2018
First Online: 17 December 2018
: B.M.V., B.B. and I.N. had consulting positions at SeqOmics Biotechnology Ltd at the time the study was conceived. SeqOmics Biotechnology Ltd was not directly involved in the design and execution of the experiments or in the writing of the manuscript. This does not alter the authors’ adherence to all the Nature policies on sharing data and materials. The other authors declare no competing interests.