- Unwillingness or inability to comply with the protocol (e.g. the patient cannot read or write and does not have another person to assist in completing the diary; the patient cannot be followed for 1 weeks). Patients unable to give informed consent are to be excluded from participation in the trial. Patients with legally appointed custodian can not be enrolled in the trial. In case of doubt an independent psychiatrist should testify that the patient is able to give informed consent