TY - JOUR AU - Freire Vila, Enrique AU - Camba Rodríguez, Manuel Alberto AU - Nistal Nuño, Beatriz AU - Castro Seoane, Francisco PY - 2014 SN - 20461402 UR - http://hdl.handle.net/20.500.11940/4633 LA - eng TI - Preoperative low-dose ketamine has no preemptive analgesic effect in opioid-naive patients undergoing colon surgery when nitrous oxide is used - a randomized study DO - 10.12688/f1000research.5258.1 T2 - F1000Research M2 - 226 VL - 3 ER -