The role of tacrolimus in the step-up induction therapy of refractory childhood-onset lupus nephritis Posted on February 28, 2019July 26, 2022 by admin LETTER Hippokratia 2015, 19(4):378 Chatzidimitriou A, Trachana M, Pratsidou-Gertsi P Pediatric Immunology and Rheumatology Referral Center, 1st Department of Paediatrics, Medical School, Aristotle University of Thessaloniki, Greece