“…Data was not retrieved from 37 of the 54 full‐text papers for meeting the following exclusion criteria; not using free flaps ( n = 2), not reporting a failure rate ( n = 7), using only 1 free flap harvest site ( n = 6), using an uncommon combination of free flaps ( n = 1), studying cadavers ( n = 1), studying animals ( n = 1), not reporting at least 1 failure ( n = 18), or containing data from another larger study ( n = 1) . Seventeen studies underwent data extraction and are reported in Table …”