TY - RPRT TI - How to study postoperative nausea and vomiting. AU - C C Apfel AU - N Roewer AU - K Korttila PY - 2002 DO - 10.1034/j.1399-6576.2002.460801.x UR - https://pubmed.ncbi.nlm.nih.gov/12190791/ ID - 12190791 ER -