 Subjective reports of pain intensity vary over time, and to most accurately measure pain intensity our primary outcome, it is most valid to assess multiple times and take an average. Hence, study investigators have developed a method of assessment that will seek to obtain up to four telephone assessments over a period of one week or 7 days with a minimum of 24 hours between each assessment. During each telephone contact, research staff will ask participants, at minimum, to rate their current, average, worst and least pain intensity over the past 24 hours, as well as their average pain intensity over the past 7 days. In addition, if possible, research staff will ask the participant to rate their current, average, worst and least pain intensity over the past week during the final telephone contact. These assessments will be referred to as short assessments. The primary outcome will be an average of all of the 24-hour ratings range1-4 ratings of average pain intensity obtained over a period of one week during each assessment period. 