Text and Data Mining valid from 2019-04-03
Received: 11 September 2018
Revised: 9 March 2019
Accepted: 11 March 2019
First Online: 3 April 2019
Compliance with ethical standards
: Each of the 14 pediatric nephrology centers received approval from their local Institutional Review Boards for this retrospective study.
: The authors declare that they have no conflict of interest.