Flow chart of treatment schedule. (1) Daily documentation until day 7 has to be done in the patient chart. CRF documentation will be done on day 1, 4, ±1 and 7 + 1 after surgery. Adverse events have to be documented as soon as they occur. (2) Has to be done daily with respective documentation in the patient file. (3) CRF documentation will be done on these days. (4) Generally if the patient is discharged before day 7, all documentation required until the day of discharge (e.g. day 1, 4, etc.) has to be completed together with the discharge page (visit 3). However if discharge is on day 1, 4 + 1 or 7 + 1 the documentation of the respective day (day1, 4 or 7) can be omitted (with the exception of the header which has to be filled in); only the discharge page (visit 3) needs to be filled in instead.