Long-term follow-up of children with chronic non-bacterial osteomyelitis—assessment of disease activity, risk factors, and outcome oleh Christiane Reiser, Jens Klotsche, Toni Hospach, Georg Heubner, Daniel Windschall, Ralf Trauzeddel, Nadine Groesch, Martina Niewerth, Kirsten Minden, Hermann Girschick