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Langerhans cell histiocytosis. Advances in pathogenesis and clinical practice Itziar Astigarraga; Susana García-Obregón; Antonio Pérez-Martínez; Ignacio Gutiérrez-Carrasco; Vicente Santa-María; Carmen Rodríguez-Vigil Iturrate; Mikael Lorite Reggiori; Thais Murciano Carrillo; Montse Torrent;

Tocilizumab in a child with acute lymphoblastic leukaemia and COVID-19-related cytokine release syndrome Pablo Velasco Puyó; Lucas Moreno; Cristina Díaz de Heredia; Jacques G. Rivière; Pere Soler Palacín;