rst entry is
<code>sim_obs</code>, and contains all the underlying liabilities,
status, and age of onset or age for controls. The second entry is called
<code>thresholds</code> and it contains a family ID, individual ID,
family relationship to the proband, and a lower and upper threshold for
each individual. The following example simulates a family with the index
person, a mother, a father, and a single sibling. Other family members
can also be used. See the documentation for
<code><a href="../reference/sim