Early and Long-Term Evaluation of Perfusion Changes in Free DIEP-Flaps for Breast Reconstruction via IC-View and Duplex Ultrasound: Autonomous or Peripheral Perfusion? - Heitland, Andreas S; Markowicz, Marta P; Koellensperger, Eva; Schoth, Felix; Pallua, Norbert (Journal of Reconstructive Microsurgery, 2009)