Guillermo Plaza holds a degree in Medicine from the Complutense University of Madrid, a PhD in Medicine and Surgery from the University of Alcalá, a Degree in Pharmacy from the Complutense University of Madrid, and is certified in Otolaryngology. Since 2006, he has been the Head of the Otorhinolaryngology Department at the Hospital Universitario de Fuenlabrada and Hospital Universitario La Zarzuela in Madrid. He is accredited as a Professor in Health Sciences and is currently an Associate Professor of Otorhinolaryngology at the Faculty of Medicine of the the Univerdidad Rey Juan Carlos of Madrid and Collaborating Professor at the Francisco de Vitoria University. He has played a pioneering role in the implementation of endoscopic surgery and sleep apnea methods, as well as intratympanic treatment for sudden deafness and Ménière's disease. He was a key promoter of the Spanish consensus on sudden deafness, published in 2011 and revised in 2018. He has organized various meetings on this disease to raise awareness.

José Ramón García-Berrocal holds a degree in Medicine from the Complutense University of Madrid, a PhD in Medicine and Surgery from the Autonomous University of Madrid, and is certified in Otolaryngology. Since 2019, he has been the Head of the Otolaryngology Department at the Hospital Universitario Puerta de Hierro Majadahonda. He is accredited as a Professor in Health Sciences and is currently a Professor of Otorhinolaryngology at the Faculty of Medicine of the Universidad Autónoma of Madrid. He has been a pioneer in the field of clinical-experimental research on "Immune-mediated diseases of the inner ear," and is recognized as a national and international reference in this area. He has also contributed to other areas such as cisplatin ototoxicity, presbycusis, and sudden deafness, and is actively involved in ongoing research in these areas. He has been a member of the panel of experts on sudden deafness since its inception and has worked closely in the preparation of the Spanish consensus and its subsequent revision.