Corrigendum: ACE Gene Variants Rise the Risk of Severe COVID-19 in Patients With Hypertension, Dyslipidemia or Diabetes: A Spanish Pilot Study - Íñiguez, María; Pérez-Matute, Patricia; Villoslada-Blanco, Pablo; Recio-Fernandez, Emma; Ezquerro-Pérez, Diana; Alba, Jorge; Ferreira-Laso, M. Lourdes; Oteo, José A. (Frontiers in Endocrinology, 2021)