This study did not receive any funding. Ethical approval: The study was approved by the institutional review board. Confl icts of interests:The authors have no confl icts of interest to declare. Contributors: BES and KKB designed the study. BES obtained approval from the IRB for the study. AJB and AL collected the data and, in conjunction with BES and KKB, wrote the fi rst draft. BES, KKB, AJB, AL, and RCC analyzed the results and contributed to the manuscript. All authors have reviewed and approved the fi nal draft of the manuscript.