Journal of Pain and Symptom Management
Journal of Pain and Symptom Management > 2010 > 39 > 3 > 605-609
Journal of Pain and Symptom Management > 2011 > 41 > 4 > 801-807
Journal of Pain and Symptom Management > 2011 > 42 > 5 > 777-782
Journal of Pain and Symptom Management > 2013 > 46 > 3 > 355-365