参考文献

Helsinn Healthcare SA; Fadini, Luca; Manini, Peter; Pietra, Claudio; Giuliano, Claudio; Lovati, Emanuela; Cannella, Roberta; Venturini, Alessio; Stella, Valentino J. Patent: US8426450 B1, 2013 ; Location in patent: Page/Page column 33 ;