@inbook{1195026149, author={Sonia Friedman and Richard S. Blumberg and John R. Saltzman}, title={}, booktitle={Greenberger. Diagnóstico y tratamiento en gastroenterología, hepatología y endoscopia, 4e}, publisher={McGraw Hill Education}, address={New York, NY}, year={2022}, url={accessmedicina.mhmedical.com/content.aspx?aid=1195026149} }