1e
19
1
49
2
2
18
1b
1d
18
34
63
1d
2 29
1d
25
Ari Zachary Klein, PhD
88
63
Research Assistant Professor of Biostatistics and Epidemiology
28
b4
3
75
Senior Data Analyst, Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, PA
11
Department: Biostatistics and Epidemiology
4
1
b
1d
46
Contact information
68
4
3
3
3
2
4
b
1f
68
Department of Biostatistics, Epidemiology, and Informatics
23 Perelman School of Medicine
22 University of Pennsylvania
42 3600 Civic Center Blvd., 5E-313
Philadelphia, PA 19104
26
23 Perelman School of Medicine
22 University of Pennsylvania
42 3600 Civic Center Blvd., 5E-313
Philadelphia, PA 19104
35
f
13
Education:
21 7 BA 28 (Creative Writing/Philosophy) c
43 Carnegie Mellon University, Pittsburgh, PA, 2008.
21 7 MA 15 (Rhetoric) c
43 Carnegie Mellon University, Pittsburgh, PA, 2010.
21 8 PhD 15 (Rhetoric) c
43 Carnegie Mellon University, Pittsburgh, PA, 2016.
c
3
3
3
3
8d
Permanent link21 7 BA 28 (Creative Writing/Philosophy) c
43 Carnegie Mellon University, Pittsburgh, PA, 2008.
21 7 MA 15 (Rhetoric) c
43 Carnegie Mellon University, Pittsburgh, PA, 2010.
21 8 PhD 15 (Rhetoric) c
43 Carnegie Mellon University, Pittsburgh, PA, 2016.
c
2 29
21
1e
1d
24
2b
29
27
23
190 Klein AZ, Weissenbacher D, O'Connor K, Elyaderani A, Amaro IF, Onishi T, Golder S, Spiegel K, Scotch M, Gonzalez-Hernandez G.: Detection of patient metadata in published articles for genomic epidemiology using machine learning and large language models. medRxiv Page: 25326298, Apr 2025 Notes: doi: 10.1101/2025.04.25.25326298.
186 Klein AZ, Banda JM, Guo Y, Schmidt AL, Xu D, Flores Amaro I, Rodriguez-Esteban R, Sarker A, Gonzalez-Hernandez G.: Overview of the 8th Social Media Mining for Health Applications (#SMM4H) shared tasks at the AMIA 2023 Annual Symposium. J Am Med Inform Assoc 31(4): 991-996, Apr 2024 Notes: doi: 10.1093/jamia/ocae010.
161 Lee CR, Aysola J, Chen X, Addisu E, Klein A, Weissenbacher D, Gonzalez-Hernandez G, Weissman GE.: Race and Ethnicity and Clinician Linguistic Expressions of Doubt in Hospital Admission Notes. JAMA Netw Open 7(10): e2438550, Oct 2024 Notes: doi: 10.1001/jamanetworkopen.2024.38550.
12f Sarker A, Klein AZ, Mee J, Harik P, Gonzalez-Hernandez G.: An interpretable natural language processing system for written medical examination assessment. J Biomed Inform 98: 103268, Oct 2019 Notes: DOI: 10.1016/j.jbi.2019.103268.
135 Klein AZ, Magge A, Gonzalez-Hernandez G.: ReportAGE: Automatically extracting the exact age of Twitter users based on self-reports in tweets. PLoS One 17(1): e0262087, Jan 2022 Notes: doi: 10.1371/journal.pone.0262087. eCollection 2022.
153 Klein AZ, Magge A, O'Connor K, Flores Amaro JI, Weissenbacher D, Gonzalez Hernandez G.: Toward Using Twitter for Tracking COVID-19: A Natural Language Processing Pipeline and Exploratory Data Set. J Med Internet Res 23(1): e25314, Jan 2021 Notes: doi: 10.2196/25314.
19c Golder, S., Chiuve, S., Weissenbacher, D., Klein, A., O’Connor, K., Bland, M., Malin, M., Bhattacharya, M., Scarazzini, L.J., & Gonzalez-Hernandez, G.: Pharmacoepidemiologic evaluation of birth defects from health-related postings in social media during pregnancy. Drug Saf 42(3): 389-400, Mar 2019 Notes: DOI: 10.1007/s40264-018-0731-6.
10c Klein AZ, Sarker A, Weissenbacher D, Gonzalez-Hernandez G.: Towards scaling Twitter for digital epidemiology of birth defects. NPJ Digit Med 2: 96, Oct 2019 Notes: doi: 10.1038/s41746-019-0170-5.
2c
7
1d
1f
Selected Publications
17a Klein AZ, Kunatharaju S, Golder S, Levine LD, Figueiredo JC, Gonzalez-Hernandez G.: Association Between COVID-19 During Pregnancy and Preterm Birth by Trimester of Infection: Retrospective Cohort Study Using Large-Scale Social Media Data. J Med Internet Res 27: e66097, Jul 2025 Notes: doi: 10.2196/66097.190 Klein AZ, Weissenbacher D, O'Connor K, Elyaderani A, Amaro IF, Onishi T, Golder S, Spiegel K, Scotch M, Gonzalez-Hernandez G.: Detection of patient metadata in published articles for genomic epidemiology using machine learning and large language models. medRxiv Page: 25326298, Apr 2025 Notes: doi: 10.1101/2025.04.25.25326298.
186 Klein AZ, Banda JM, Guo Y, Schmidt AL, Xu D, Flores Amaro I, Rodriguez-Esteban R, Sarker A, Gonzalez-Hernandez G.: Overview of the 8th Social Media Mining for Health Applications (#SMM4H) shared tasks at the AMIA 2023 Annual Symposium. J Am Med Inform Assoc 31(4): 991-996, Apr 2024 Notes: doi: 10.1093/jamia/ocae010.
161 Lee CR, Aysola J, Chen X, Addisu E, Klein A, Weissenbacher D, Gonzalez-Hernandez G, Weissman GE.: Race and Ethnicity and Clinician Linguistic Expressions of Doubt in Hospital Admission Notes. JAMA Netw Open 7(10): e2438550, Oct 2024 Notes: doi: 10.1001/jamanetworkopen.2024.38550.
12f Sarker A, Klein AZ, Mee J, Harik P, Gonzalez-Hernandez G.: An interpretable natural language processing system for written medical examination assessment. J Biomed Inform 98: 103268, Oct 2019 Notes: DOI: 10.1016/j.jbi.2019.103268.
135 Klein AZ, Magge A, Gonzalez-Hernandez G.: ReportAGE: Automatically extracting the exact age of Twitter users based on self-reports in tweets. PLoS One 17(1): e0262087, Jan 2022 Notes: doi: 10.1371/journal.pone.0262087. eCollection 2022.
153 Klein AZ, Magge A, O'Connor K, Flores Amaro JI, Weissenbacher D, Gonzalez Hernandez G.: Toward Using Twitter for Tracking COVID-19: A Natural Language Processing Pipeline and Exploratory Data Set. J Med Internet Res 23(1): e25314, Jan 2021 Notes: doi: 10.2196/25314.
19c Golder, S., Chiuve, S., Weissenbacher, D., Klein, A., O’Connor, K., Bland, M., Malin, M., Bhattacharya, M., Scarazzini, L.J., & Gonzalez-Hernandez, G.: Pharmacoepidemiologic evaluation of birth defects from health-related postings in social media during pregnancy. Drug Saf 42(3): 389-400, Mar 2019 Notes: DOI: 10.1007/s40264-018-0731-6.
10c Klein AZ, Sarker A, Weissenbacher D, Gonzalez-Hernandez G.: Towards scaling Twitter for digital epidemiology of birth defects. NPJ Digit Med 2: 96, Oct 2019 Notes: doi: 10.1038/s41746-019-0170-5.
2c