Funding for this research was provided by:
Merck & Co., Inc., Kenilworth, NJ USA (IISP#39298)
Received: 13 July 2018
Accepted: 14 January 2019
First Online: 29 January 2019
Ethics approval and consent to participate
: Our study was performed in accordance with the Declaration of Helsinki with regard to ethical principles for research involving human subjects. All patients provided informed written consent before beginning the study and the Ethics Committee of each clinic center approved the protocols.
: Consent for publication was obtained from all enrolled patients.
: The authors declare that they have no competing interests.
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