Juan J. Lojo, MD, Department of Surgery, UPR School of Medicine, San Juan, Puerto Rico.
Ricardo de la Villa, MD, Department of Surgery, UPR School of Medicine, San Juan, Puerto Rico.
Mayte M. Vega-Torres, BS, Department of Biology, University of Puerto Rico Rio, Piedras Campus, San Juan, Puerto Rico.
Esther A. Torres, MD, Department of Medicine, UPR School of Medicine, San Juan, Puerto Rico.
Correspondence: Juan J. Lojo, MD, Department of Surgery, UPR School of Medicine, PO Box 11698, San Juan, PR 00922 ([email protected]).
The authors have no conflict of interest to declare.