1. Which Treatment Is Better
Which Treatment Is Better? Ascertaining Patient Preferences With Crossover Randomized Controlled Trials 
David Hui, MD, MSc, Donna S. Zhukovsky, MD, Eduardo Bruera, MD 
Journal of Pain and Symptom Management 
Volume 49, Issue 3, Pages (March 2015)
DOI: /j.jpainsymman
Copyright © 2015 American Academy of Hospice and Palliative Medicine Terms and Conditions

2. Fig. 1
Randomized controlled trial design. a) Parallel trial and b) crossover trial.
Journal of Pain and Symptom Management  , DOI: ( /j.jpainsymman )
Copyright © 2015 American Academy of Hospice and Palliative Medicine Terms and Conditions