Text and Data Mining valid from 2019-05-10
Received: 1 February 2019
Accepted: 4 May 2019
First Online: 10 May 2019
Ethics approval and consent to participate
: Approval and adherence to the tenets of the Declaration of Helsinki was assessed by the University of the Philippines Manila Research Ethics Board (UPMREB) with Code (OVS) 2016-403-01 approved October 19, 2016). This study was a chart review; patient anonymity and confidentiality were and are protected and preserved with identifiable data omitted.
: Not applicable.
: The authors declare that they have no competing interests.