Officer, Kirsty, Pruvot, Mathieu, Horwood, Paul, Denk, Daniela, Warren, Kris, Hul, Vibol, Thy, Nhim, Broadis, Nev, Dussart, Philippe, and Jackson, Bethany (2020) Epidemiology and pathological progression of erythematous lip lesions in captive sun bears (Helarctos malayanus). PLoS ONE, 15 (12). e0243180.