Spontaneous Remission of Severe Systemic Langerhans Cell Histiocytosis with Bladder Involvement: A Case Study oleh Isotta M. Magaton, Alexandar Tzankov, Fatime Krasniqi, Christof Rottenburger, Rosanna Zanetti-Daellenbach, Peter Grendelmeier, Viola  Heinzelmann-Schwarz, Michael Mayr, Fabienne D. Schwab