Fragoulis, George E. Evangelatos, Gerasimos Arida, Aikaterini and Bournia, Vasiliki-Kalliopi Fragiadaki, Kalliopi Karamanakos, Anastasios Kravvariti, Evrydiki Laskari, Katerina and Panopoulos, Stylianos Pappa, Maria Tektonidou, Maria G. and Sfikakis, Petros P., Treatment adherence of patients with systemic rheumatic diseases in COVID-19 pandemic, Annals of the Rheumatic Diseases, (80), 2021, BMJ Publishing Group, 0003-4967, 1468-2060