Journal of Pain and Symptom Management
Journal of Pain and Symptom Management > 2008 > 35 > 6 > 644-655
Journal of Pain and Symptom Management > 2012 > 44 > 2 > 215-228
Journal of Pain and Symptom Management > 2013 > 45 > 2 > 244-260
Journal of Pain and Symptom Management > 2014 > 47 > 4 > 721-730