Following Up Nonrespondents to an Online Weight Management Intervention: Randomized Trial Comparing Mail versus Telephone by Couper, Mick P, Peytchev, Andy, Strecher, Victor J, Rothert, Kendra, Anderson, Julia

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Comparison of early-, late-, and non-participants in a school-based asthma management program for urban high school students by Alexander Gwen, Peterson Edward L, Johnson Dayna, Johnson Christine C, Havstad Suzanne L, Saltzgaber Jacquelyn, Joseph Christine LM, Couper Mick P, Ownby Dennis R

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Reach, Engagement, and Retention in an Internet-Based Weight Loss Program in a Multi-Site Randomized Controlled Trial by Glasgow, Russell E, Nelson, Candace C, Kearney, Kathleen A, Reid, Robert, Ritzwoller, Debra P, Strecher, Victor J, Couper, Mick P, Green, Beverly, Wildenhaus, Kevin

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Engagement and Retention: Measuring Breadth and Depth of Participant Use of an Online Intervention by Couper, Mick P, Alexander, Gwen L, Zhang, Nanhua, Little, Roderick JA, Maddy, Noel, Nowak, Michael A, McClure, Jennifer B, Calvi, Josephine J, Rolnick, Sharon J, Stopponi, Melanie A, Cole Johnson, Christine

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Nonprobability Web Surveys to Measure Sexual Behaviors and Attitudes in the General Population: A Comparison With a Probability Sample Interview Survey by Erens, Bob, Burkill, Sarah, Couper, Mick P, Conrad, Frederick, Clifton, Soazig, Tanton, Clare, Phelps, Andrew, Datta, Jessica, Mercer, Catherine H, Sonnenberg, Pam, Prah, Philip, Mitchell, Kirstin R, Wellings, Kaye, Johnson, Anne M, Copas, Andrew J

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