Study setting {9}
TRANSITION
The organizing hospital, Canisius Wilhelmina Hospital, is excluded from participation because the quilting suture technique already is standard care for multiple years. The participating nine hospitals provide standard care by conventional wound closure with postoperative drainage. These nine hospitals will be randomized for implementation of the quilting suture technique as a cluster. With each step every two weeks, one cluster is randomised to implement the quilting suture technique, there will be nine steps. Transition period or learning curve is expected to be 8 weeks. Follow up continues for six months postoperatively (Fig. Stepped wedge schedule for the QUILT study