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Engen, Nicole Wyman, Kathy Huppler Hullsiek, Waldo H. Belloso, Elizabeth Finley, Fleur Hudson, Eileen Denning, Catherine Carey, Mary Pearson, and Jonathan Kagan. "A Randomized Evaluation of On-site Monitoring Nested in a Multinational Randomized Trial Short Title: Randomized Trial of On-site Monitoring." Clin Trials 2019.

Engen, Nicole Wyman, et al. "A Randomized Evaluation of On-site Monitoring Nested in a Multinational Randomized Trial Short Title: Randomized Trial of On-site Monitoring." Clin Trials 2019.