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Smoking Cessation Smartphone App for Nondaily Smoking With Telephone Onboarding: Proof-of-Concept Randomized Controlled Trial

Bettina B Hoeppner, Kaitlyn R Siegel, Allison E Futter, Diadora Finley-Abboud, Alivia C Williamson, Christopher W Kahler, Elyse R Park, Susanne S Hoeppner

JMIR Mhealth Uhealth 2025;13:e53971

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Experimentally Induced Reductions in Alcohol Consumption and Brain, Cognitive, and Clinical Outcomes in Older Persons With and Those Without HIV Infection (30-Day Challenge Study): Protocol for a Nonrandomized Clinical Trial

Robert L Cook, Veronica L Richards, Joseph M Gullett, Brenda D G Lerner, Zhi Zhou, Eric C Porges, Yan Wang, Christopher W Kahler, Nancy P Barnett, Zhigang Li, Suresh Pallikkuth, Emmanuel Thomas, Allan Rodriguez, Kendall J Bryant, Smita Ghare, Shirish Barve, Varan Govind, Jessy G Dévieux, Ronald A Cohen, The 30-Day Challenge Research Team

JMIR Res Protoc 2024;13:e53684

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Testing the Outcomes of a Smoking Cessation Smartphone App for Nondaily Smokers: Protocol for a Proof-of-concept Randomized Controlled Trial

Bettina B Hoeppner, Kaitlyn R Siegel, Sarah R Dickerman, Akshiti A Todi, Christopher W Kahler, Elyse R Park, Susanne S Hoeppner

JMIR Res Protoc 2023;12:e40867

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Feature-Level Analysis of a Smoking Cessation Smartphone App Based on a Positive Psychology Approach: Prospective Observational Study

Bettina B Hoepper, Kaitlyn R Siegel, Hannah A Carlon, Christopher W Kahler, Elyse R Park, Steven Trevor Taylor, Hazel V Simpson, Susanne S Hoeppner

JMIR Form Res 2022;6(7):e38234

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Game Plan—a Brief Web-Based Intervention to Improve Uptake and Use of HIV Pre-exposure Prophylaxis (PrEP) and Reduce Alcohol Use Among Gay and Bisexual Men: Content Analysis

Tyler B Wray, Philip A Chan, John P Guigayoma, Christopher W Kahler

JMIR Form Res 2022;6(1):e30408

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A Smoking Cessation App for Nondaily Smokers (Version 2 of the Smiling Instead of Smoking App): Acceptability and Feasibility Study

Bettina B Hoeppner, Kaitlyn R Siegel, Hannah A Carlon, Christopher W Kahler, Elyse R Park, Susanne S Hoeppner

JMIR Form Res 2021;5(11):e29760

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Game Plan, a Web-Based Intervention to Improve Adherence and Persistence to HIV Pre-exposure Prophylaxis and Reduce Heavy Drinking in Gay, Bisexual, and Other Men Who Have Sex With Men: Usability and User Experience Testing

Tyler B Wray, Philip A Chan, Christopher W Kahler

JMIR Form Res 2021;5(11):e31843

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A Digital Smoking Cessation Program for Heavy Drinkers: Pilot Randomized Controlled Trial

Christopher W Kahler, Amy M Cohn, Catherine Costantino, Benjamin A Toll, Nichea S Spillane, Amanda L Graham

JMIR Form Res 2020;4(6):e7570

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Leveraging Positive Psychology to Support Smoking Cessation in Nondaily Smokers Using a Smartphone App: Feasibility and Acceptability Study

Bettina B B. Hoeppner, Susanne S Hoeppner, Hannah A Carlon, Giselle K Perez, Eric Helmuth, Christopher W Kahler, John F Kelly

JMIR Mhealth Uhealth 2019;7(7):e13436

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Game Plan: Development of a Web App Designed to Help Men Who Have Sex With Men Reduce Their HIV Risk and Alcohol Use

Tyler Blake Wray, Christopher W Kahler, Erik M Simpanen, Don Operario

JMIR Form Res 2018;2(2):e10125

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