The primary objective of this study is to investigate weekly
prophylaxis dosing regimens used in standard clinical practice.
In addition the study will capture reported bleed rate, pattern of
change in KOVALTRY prophylaxis dose & dosing frequency,
reason for choice of treatment regimen, FVIII product switch
pattern, patient treatment satisfaction and adherence,
KOVALTRY pharmacokinetic data (if performed), KOVALTRY
consumption, as well as safety data.