Defeat Rare Disease in Asia and Pacific (APAC) DRDA - Haemophilia

Inclusion Criteria: For Experienced/Senior Treating Physicians * Experienced/senior haematologist treating haemophilia (adult or paediatric) or physician treating patients with haemophilia. (PWH), with greater than 5 years of experience. * Able to communicate in English or country specific language. * Agree/sign informed consent before data collection. For Patients Organisations * Patient organisation supporting haemophilia. * Expert having greater than 3 years of work experience with the patient organisation. * Expert level understanding of haemophilia landscape and care pathway in the relevant country. * Able to communicate in English or country specific language. * Agree/sign informed consent before data collection. For Patients/Caregivers 1. Patients of all age groups, diagnosed with haemophilia A or haemophilia B (with or without inhibitors) for greater than 2 years. 2. For patients less than 18 years of age (\*less than 19 years for South Korea), their caregivers aged greater than or equal to 18 years (\*greater than or equal to19 years for South Korea) should sign the informed consent. \*For South Korea, the adult age is 19 years. 3. Able to communicate in English or country specific language. 4. Agree/sign informed consent before data collection. Exclusion Criteria: * There is no explicit exclusion criterion in this study, thus any participants group who answers "no" to any of the inclusion criteria will be excluded from the study.