ass="fu"><a href="https://ggplot2.tidyverse.org/reference/facet_grid.html" class="external-link">facet_grid</a></span><span class="op">(</span><span class="op">~</span> <span class="va">STUDY</span><span class="op">)</span> <span class="op">+</span></span>
<span>    <span class="fu"><a href="https://ggplot2.tidyverse.org/reference/geom_ribbon.html" class="external-link">geom_ribbon</a></span><span class="op">(</span><span class="fu"><a href="https://ggplot2.tidyverse.org/reference/aes.html" class="external-