Article History
Received: 22 October 2019
Accepted: 4 December 2019
First Online: 20 December 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the local Institutional Review Board.
: The study protocol is in accordance with the Declaration of Helsinki as revised in 2000 and was approved by the local ethics committee in each study center.
: Verbal informed consent was obtained from each patient.