Sleep quality with WHO Step III opioid use for cancer pain
Gunnhild Jakobsen, Morten Engstrøm, Peter Fayers, Marianne J Hjermstad, Stein Kaasa, Marianne Kloke, Rainer Sabatowski, Pal Klepstad
BMJ Supportive & Palliative Care Sep 2019, 9 (3) 307-315; DOI: 10.1136/bmjspcare-2017-001399