Diurnal production of cortisol and prediction of treatment response in rheumatoid arthritis: a 6-month, real-life prospective cohort study oleh George E Fragoulis, Antonis Fanouriakis, Maria G Tektonidou, Petros P Sfikakis, Gerasimos Evangelatos, Vasiliki-Kalliopi Bournia, Katerina Laskari, Stylianos Panopoulos, GEORGE P CHROUSOS, Maria P Yavropoulou, Maria G Filippa, Nikolaos I Vlachogiannis, Aimilia Mantzou, Aggeliki Papapanagiotou