Lack of skin manifestations in COVID-19 hospitalized patients during the second epidemic wave in Spain: a possible association with a novel SARS-CoV-2 variant - a cross-sectional study
1 Dermatology Department, Ramon y Cajal University Hospital, Instituto de Investigación Sanitaria del Hospital Ramón y Cajal (Irycis), Universidad de Alcalá de Henares, Madrid, Spain.