Ethical requirements and authorship:  not much room for interpretation.
Martin R
MR
Tramèr
D003106:Colon / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D010100:Oxygen / Q000008:administration & dosage*; D020250:Postoperative Nausea and Vomiting / Q000517:prevention & control*; D012701:Serotonin / Q000378:metabolism*
D012701:Serotonin; D010100:Oxygen