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Monitoring Physical Activity Levels Using Twitter Data: Infodemiology Study

Sam Liu, Brian Chen, Alex Kuo

J Med Internet Res 2019;21(6):e12394

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Monitoring Freshman College Experience Through Content Analysis of Tweets: Observational Study

Sam Liu, Miaoqi Zhu, Sean D Young

JMIR Public Health Surveill 2018;4(1):e5

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Family History Extraction From Synthetic Clinical Narratives Using Natural Language Processing: Overview and Evaluation of a Challenge Data Set and Solutions for the 2019 National NLP Clinical Challenges (n2c2)/Open Health Natural Language Processing (OHNLP) Competition

Feichen Shen, Sijia Liu, Sunyang Fu, Yanshan Wang, Sam Henry, Ozlem Uzuner, Hongfang Liu

JMIR Med Inform 2021;9(1):e24008

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Geographic Differences in Cannabis Conversations on Twitter: Infodemiology Study

Jenna van Draanen, HaoDong Tao, Saksham Gupta, Sam Liu

JMIR Public Health Surveill 2020;6(4):e18540

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The Effectiveness of Loyalty Rewards to Promote the Use of an Internet-Based Heart Health Program

Sam Liu, Corinne Hodgson, Ahmad M Zbib, Ada YM Payne, Robert P Nolan

J Med Internet Res 2014;16(7):e163

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Using Real-Time Social Media Technologies to Monitor Levels of Perceived Stress and Emotional State in College Students: A Web-Based Questionnaire Study

Sam Liu, Miaoqi Zhu, Dong Jin Yu, Alexander Rasin, Sean D Young

JMIR Ment Health 2017;4(1):e2

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The 2019 n2c2/OHNLP Track on Clinical Semantic Textual Similarity: Overview

Yanshan Wang, Sunyang Fu, Feichen Shen, Sam Henry, Ozlem Uzuner, Hongfang Liu

JMIR Med Inform 2020;8(11):e23375

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To Use or Not to Use – Practitioners’ Perceptions of an Open Web Portal for Young Patients With Diabetes

Sam Nordfeldt, Teresia Ängarne-Lindberg, Carina Berterö

J Med Internet Res 2012;14(6):e154

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Mining Open Payments Data: Analysis of Industry Payments to Thoracic Surgeons From 2014-2016

Xu Na, Haihong Guo, Yu Zhang, Liu Shen, Sizhu Wu, Jiao Li

J Med Internet Res 2018;20(11):e11655

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Usability Testing of an Internet-Based e-Counseling Platform for Adults With Chronic Heart Failure

Ada YM Payne, Jelena Surikova, Sam Liu, Heather Ross, Teodora Mechetiuc, Robert P Nolan

JMIR Hum Factors 2015;2(1):e7

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