2307-33492307-3349S2307-3349201800010003510.18004/rspp.2018.junio.35-39ParaguayParaguay0006201800062018813539200816577803-12200927451-6420109722273-80Department of Anesthesiology, Mount Sinai School of Medicine, New York2009103^s1^s1141-620102755411-6200480388-93200927451-641993119474-8120063541157-65200719197-21420092663-8201115519-232008109296-302200927451-64