	Romina Alvizures Dra. Romina Alvizures, médico y cirujano. Médico y cirujano

Romina Alvizures

Dra. Romina Alvizures, médico y cirujano.

Médico y cirujano

Más vídeos de Romina Alvizures

<img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive">

Romina Alvizures: Uso de Midazolam con pacientes cardiópatas en cirugíano cardíaca

Romina Alvizures

26 de agosto de 2021

<img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive">

Med-Challenge 2016: Torneo médico interuniversitario

Romina Alvizures

22 de octubre de 2016

<img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive">

Med-Challenge 2016: Torneo médico interuniversitario (Final)

Romina Alvizures

22 de octubre de 2016

<img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive">

Med-challenge 2016: Torneo médico interuniversitario (Semifinal)

Romina Alvizures

22 de octubre de 2016

<img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive">

Med-Challenge 2016: Torneo médico interuniversitario (Preliminar)

Romina Alvizures

22 de octubre de 2016

<img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive">

Iniciando la experiencia médico-hospitalaria

Romina Alvizures, Daniel Prentice, Freddy Duarte, Saúl Ríos

09 de octubre de 2014

<img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive">

ELECTIVO MÉDICO EN EL EXTRANJERO – Preparación hacia la residencia institucional

Romina Alvizures

29 de octubre de 2013

<img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="img-responsive">

Electivo médico en el extranjero: Búsqueda de información médica en Internet

Romina Alvizures

24 de octubre de 2013

IDEAS DE LA LIBERTAD

Nuestra misión es la enseñanza y difusión de los principios éticos, jurídicos y económicos de una sociedad de personas libres y responsables.

Universidad Francisco Marroquín

<img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="">

Lección inaugural 2023: Los desafíos del liberalismo en el siglo XXI

<img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="">

¿Qué modelo de libertad conviene exportar?

<img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="">

My Experience with Milton Friedman in Free to Choose Network

<img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="">

Ideas sobre la libertad: de la academia a la práctica

<img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="">

El pensamiento liberal de Bertrand de Jouvenel

<img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" data-src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="><noscript><img style="width: 28px; margin-left:15px;" src="https://newmedia.ufm.edu/wp-content/themes/newmedia_ufm/img/play.png" class="">

Panel con Mario Vargas Llosa: Un intelectual comprometido con la libertad