Kaplan–Meier curves comparing DFI (in days) in relation to BW of dogs. (A) DFI of CSPG4-positive cMM vaccinated dogs (group A) with BW <20 kg (black line) and with BW >20 kg (black dotted line). (B, C) DFI of CSPG4-positive cMM vaccinated dogs (group A) with BW <20 kg (black line) in comparison with DFI of (B) the entire population of non-vaccinated dogs (group B, grey dotted line; * log-rank test P = 0.0252) or of (C) non-vaccinated dogs with BW <20 kg (group B, grey line; ** log-rank test P = 0.0070). (D, E) DFI of CSPG4-positive cMM vaccinated dogs (group A) with BW >20 kg (black dotted line) in comparison with DFI of (D) the entire population of non-vaccinated dogs (group B, grey dotted line) or of (E) non-vaccinated dogs with BW >20 kg (group B, grey line).