Fig. 1From: Adjusting heterogeneous ascertainment bias for genetic association analysis with extended familiesTwo sample pedigree structures from AD data; (a) individual 9 of family 1 was selected as a "proband" and individual 3–8 of family 1 were selcted as "non-probands" (b) individual 3 of family 2 was selected as a "proband" and individual 4–6 of family 2 were selcted as "non-probands"Back to article page