Received: 5 February 2019
Revised: 11 July 2019
Accepted: 21 August 2019
First Online: 8 October 2019
Compliance with Ethical Standards
: Informed consent was obtained at each follow-up examination. Institutional Review Board (IRB) approval was obtained from all study sites prior to data collection.
: The authors declare that they do not have a conflict of interest.
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