44. ASSOCIATION BETWEEN VENOUS THROMBOEMBOLISM RATES AND DIFFERENT PROPHYLACTIC ANTICOAGULATION REGIMENS IN PATIENTS UNDERGOING FREE FLAP RECONSTRUCTION OF THE HEAD AND NECK REGION. (1st April 2022) - Saadoun, Rakan; Bengur, Fuat B.; Moroni, Elizabeth A.; Kubik, Mark; Shaum, Sridharan; Solari, Mario G.