The goal of the LeucoPatch ™ study is to investigate the effect of LeucoPatch ™ in diabetic foot ulcer. LeucoPatch ™ is a biologically active dressings which are made solely by the patient's own blood (autologous). It is produced in the CE (European Conformity) marked LeucoPatch™ Device and contains no additives. In this treatment study up to 75 typical diabetic patients with foot ulcers are included. These wounds are typically chronic and lead to reduced quality of life and ability to work, and extensive treatment costs. Furthermore, these wounds often lead to amputations.The study is a multicenter study in which up to 10 wound clinics are expected to be involved.