{Reference Type}: Letter {Title}: Authors' Reply to: Minimizing Selection and Classification Biases Comment on "Clinical Characteristics and Prognostic Factors for Intensive Care Unit Admission of Patients With COVID-19: Retrospective Study Using Machine Learning and Natural Language Processing". {Author}: Izquierdo JL;Soriano JB; {Journal}: J Med Internet Res {Volume}: 23 {Issue}: 5 {Year}: 05 2021 26 {Factor}: 7.076 {DOI}: 10.2196/29405 {Abstract}: