Increased Levels of ICOS and ICOSL Are Associated to Pulmonary Arterial Hypertension in Patients Affected by Connective Tissue Diseases oleh Mattia Bellan, Francesco Murano, Federico Ceruti, Cristina Piccinino, Stelvio Tonello, Rosalba Minisini, Ailia Giubertoni, Daniele Sola, Roberta Pedrazzoli, Veronica Maglione, Giulia Francesca Manfredi, Antonio Acquaviva, Roberto Piffero, Giuseppe Patti, Mario Pirisi, Pier Paolo Sainaghi