Numbers of patients suffering from withdrawal symptoms (scoring 2 “a little burdensome” or 3 “very burdensome” on the Discontinuation-Emergent Signs and Symptoms (DESS) questionnaire after 
(PDF)Click here for additional data file.The authors wish to thank all patients and professionals for their time and willingness to participate in this study. In particular we would like to thank Riet Cretier, Fieke Wijers, and Geert Schattenberg for their help with data collection and management.