Objective pain measure: Pressure algometer will be obtained in the standard fashion as follows: the probe is applied at a 90 degree angle to the skin at a constant rate of 10kPa/s to minimize the impact of the examiner's reaction time on recorded pain thresholds. The participant is instructed by the measurer to say "stop" when the sensation of pressure became the very first sensation of pain. There will be three spots to test patients, one for familiarity of the testing and the other 2 for data collection.