Axillary temperature will be recorded by iThermonitor, a Raiing Medical wireless module, paired to an iPhone. An adhesive patch provided by Raiing will be used to securely position the Railing probe in a shaved axilla before the anesthesia induction. Patients will be asked to adduct the ipsilateral arm for up to 5 minutes after the probe is inserted, or until the temperature displayed on the paired iPhone is stable. Thereafter, patients will be free to move their arms.Monitored arm position during surgery will be recorded (arm tightly tucked, arm loose at side, arm abducted).