“…70,72,[133][134][135][136] Fourteen studies reported the effect of combined mechanical and pharmacological prophylaxis compared with mechanical prophylaxis alone on the risk of mortality. 36,60,62,68,120,121,124,125,127,128,130,133,134,136 Sixteen studies reported the effect on the development of symptomatic PEs, 60,62,70,[120][121][122][123][124][125][126][127][128][129][130][131]134 and 11 studies reported on the effect on any PEs 36,118,120,121,126,128,130,131,133,135,136 Six studies reported data on symptomatic DVTs, ...…”