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Flap model. (A) Three vascular territories and two choke vessel zones of the flap observed from the pedicle to distal, containing the deep circumflex iliac (DCI) territory, posterior intercostal (IC) territory, thoracodorsal (TD) territory, first choke zone (FCZ), and second choke zone (SCZ). (B) Only the DCI artery was retained, IC artery, and TD artery were ligated.
