Participants with MF: Response using the revised IWG-MRT and ELN response criteria for MF
Timeframe: Up to 3 years and 60 days
Participants With MF: Percentage of participants achieving spleen volume reduction as defined in the protocol
Timeframe: Up to 3 years and 60 days
Participants with MF with symptomatic anemia: Anemia Response
Timeframe: Up to 3 years and 60 days
Participants With ET: Response Rate
Timeframe: Up to 3 years and 60 days
Participants With ET: Mean change from baseline of total symptom score (TSS)
Timeframe: Up to 3 years and 60 days
Mean change in disease-related allele burden
Timeframe: Up to 3 years and 60 days
Pharmacokinetics Parameter: Cmax of INCA33989
Timeframe: Up to 3 years and 60 days
Pharmacokinetics Parameter: Tmax of INCA033989
Timeframe: Up to 3 years and 60 days
Pharmacokinetics Parameter: Cmin of INCA33989
Timeframe: Up to 3 years and 60 days
Pharmacokinetics Parameter: AUC(0-t) of INCA33989
Timeframe: Up to 3 years and 60 days
Pharmacokinetics Parameter: AUC 0-∞ of INCA33989
Timeframe: Up to 3 years and 60 days
Pharmacokinetics Parameter: CL/F of INCA33989
Timeframe: Up to 3 years and 60 days
Pharmacokinetics Parameter: Vz/F of INCA33989
Timeframe: Up to 3 years and 60 days
Pharmacokinetics Parameter: t1/2 of INCA33989
Timeframe: Up to 3 years and 60 days