Merup, Mats, Wiveca Åberg, Eva Löfvenberg, Else Svensson, Katarina Engman, Christer Paul, and Ann Gardulf. 2002. “Symptoms, Symptom Distress and Health-Related Quality of Life in Patients With Polycythaemia Vera or Essential Thrombocythaemia During Treatment With Interferon-Alpha”. Acta Oncologica 41 (1):50-55. https://doi.org/10.1080/028418602317314064.