Biggs R, Rizza C R
Lancet. 1976 Aug 28;2(7983):431-3. doi: 10.1016/s0140-6736(76)92523-x.
Plasma samples from 41 mothers of haemophilic sons in "simplex families" (families with only one affected member) have been tested for factor VIII and factor-VIII-related antigen. The results suggest that 39 of these women are likely to be carriers of haemophilia.