al.</em>’s example. We have outcomes in 10 disease subgroups. The number of responses is stored in <code>group_responses</code> and the number of patients in <code>group_sizes</code>. There have been 3 / 7 responses in subgroup 4, for example, but 0 / 2 responses in subgroup 2, and zero patients treated at all in subgroups 1, 6 and 10.</p>
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