<img width="904" height="904" src="https://news.dent.umich.edu/wp-content/uploads/2019/09/Screen-Shot-2019…; class="attachment-large size-large wp-post-image" alt="class of 1969" loading="lazy" srcset="https://news.dent.umich.edu/wp-content/uploads/2019/09/Screen-Shot-2019… 904w,