Letter by Almendro-Delia et al Regarding Article, "Association Between Surgical Indications, Operative Risk, and Clinical Outcome in Infective Endocarditis: A Prospective Study From the International Collaboration on Endocarditis". Issue 14 (6th October 2015) - Almendro-Delia, Manuel; Gálvez-Acebal, Juan; Rodríguez-Baño, Jesús