Risk factors for pulmonary complications after abdominal surgery von Fiallos, Joselyn Vanessa Flores, Guaña, Gabriela Alexandra Calle, Lara, Jhonatan Enrique Redroban, Beltrán, Tatiana Katherine Cumbicos, Chimbolema, José Rolando Chimbolema, Pulgarin, Erika Tatiana Guarnan, Sanchez, Angelica Daniela Buele, Luzuriaga, Ivan Alberto Burbano, Gómez, Luis Orlando Gómez

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