[1] Department of Surgery,
[2] Division of Endoscopic Surgery,undefined
[3] Cedars-Sinai Medical Center,undefined
[4] 8700 Beverly Boulevard,undefined
[5] Los Angeles,undefined
[6] California 90048,undefined
[7] USA,undefined
[8] Department of Surgery,undefined
[9] University of Southern California,undefined
[10] Los Angeles County–USC Medical Center,undefined
[11] 1200 North State Street,undefined
[12] Los Angeles,undefined
[13] California 90033,undefined
[14] USA,undefined