In Reply:Letters to the Editor Clinical Practice Guideline: Recommendations on Inpatient Treatment of Patients With COVID-19 by Prof. Dr. med. Stefan Kluge, Prof. Dr. med. Uwe Janssens, PD Dr. med. Christoph D. Spinner, Prof. Dr. med. Michael Pfeifer, Prof. Dr. med. Gernot Marx, and Prof. Dr. med. Christian Karagiannidis in issue 1–2/2021