This study is conducted in Africa, Asia, Europe, North America and South America.

The purpose of the survey is to identify the key psychosocial issues affecting patients with haemophilia.

Inclusion Criteria:

• Males with haemophilia A or B (with or without inhibitors)
• Parents/carers of children aged below 18 years with haemophilia A or B (with or without inhibitors)
• Patients currently receiving treatment for haemophilia with one of the following: replacement factor VIII or replacement factor IX or a bypassing agent (recombinant factor VIIa or aPCC (Activated prothrombin complex concentrate))
• Patients with haemophilia, not currently receiving treatment with replacement factor VIII or IX or a bypassing agent (as appropriate), but who have had at least one spontaneous bleed into one or more joints within the last 12 months
• Subjects must have access to the internet, either at home or at a location convenient to them, be able to complete a paper questionnaire, or be available to attend a face-to-face interview (Algerian subjects only), to participate in the survey

Exclusion Criteria:

• Inability to understand and comply with written and verbal instructions unless assisted at the haemophilia treatment centre (HTC) or by a relative

Adult males with haemophilia and parents/carers of children with haemophilia.