Excerpt from Harvard School of Public Health Catalog: Advancing the Public's Health Through Learning, Discovery, and CommunicationAll doctoral students are required to participate as a teaching assistant in a course offered by the department. Stu dents must also take a consulting semi nar or complete an outside project approved by the seminar director.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.