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[1]
Division of Pulmonology, Ospedale Regionale di Bellinzona, Ente Ospedaliero Cantonale (EOC), Bellinzona, Switzerland
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[2]
Institute of Pathology, Ospedale di Locarno, Ente Ospedaliero Cantonale (EOC), Locarno, Switzerland
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[3]
Division of Pulmonology, Department of Medicine, Lausanne University Hospital (CHUV), and University of Lausanne (UNIL), Lausanne, Switzerland