- inability to understand and sign the written consent form - inability to perform saturation measurements or sit-to-stand test - not willing to be admitted to hospital - on the discretion of the recruiting clinician if he or she deems a patient not eligible the following criterion will be used to exclude patients from randomization to the trial: - contra-indication for dexamethasone

- inability to understand and sign the written consent form - inability to perform saturation measurements or sit-to-stand test - not willing to be admitted to hospital - on the discretion of the recruiting clinician if he or she deems a patient not eligible the following criterion will be used to exclude patients from randomization to the trial: - contra-indication for dexamethasone