qualifications: PhD
contribution: Study conception and design, Drafting of manuscript
position: Surgeon
qualifications: MD
contribution: Analysis and interpretation of data, Drafting of manuscript
position: Anesthesiologist
qualifications: MD
contribution: Study conception and design, Acquisition of data
position: Resident Surgeon
qualifications: MD
contribution: Acquisition of data, Analysis and interpretation of data
position: Resident Surgeon
qualifications: MD
contribution: Analysis and interpretation of data, Drafting of manuscript, Critical revision
position: Surgeon
qualifications: MD
contribution: Study conception and design, Critical revision
position: Surgeon