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Combination of granulocyte¿monocyte apheresis and ustekinumab: Multicentre and retrospective study Iago Rodríguez-Lago; Claudia Herrera-deGuise; Maia Boscá-Watts; Cristina Rodríguez; Eduardo Leo-Carnerero; María Calvo Íñiguez; Fiorella Cañete; Silvia Chacón; Camila Cuarán; Ainara Elorza; Elena Guerra-del-Río; Eva Iglesias; Damián Sánchez; Manuel Barreiro-de Acosta; Daniel Ginard; José Luis Cabriada;