Howard S. An

26.8k citations

431 papers · 20.1k indexed · 5 hit papers · h-index 74

Impact in

Pathology and Forensic Medicine top 0.01%
- Spine and Intervertebral Disc Pathology
Pharmacology top 0.02%
- Musculoskeletal pain and rehabilitation

Papers in

Pathology and Forensic Medicine 359
- Spine and Intervertebral Disc Pathology 356
Pharmacology 148
- Musculoskeletal pain and rehabilitation 138

Co-authors: Koichi Masuda Gunnar B. J. Andersson Tae‐Hong Lim Victor M. Haughton Eugene J-M.A. Thonar Dino Samartzis Atsushi Fujiwara Kern Singh
Journals: Spine (127 papers)The Spine Journal (71 papers)European Spine Journal (20 papers)Global Spine Journal (15 papers)Journal of Bone and Joint Surgery (11 papers)
Partner nations: United States Japan South Korea

In The Last Decade

Howard S. An

423 papers receiving 19.4k citations

Hit Papers

5 papers align trajectories log scale

Complications with the use of bone morphogenetic protein 2 (BMP-2) in spine surgery 2014 · 340 citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

2014 The Spine Journal
2010 Spine
2008 New England Journal of Medicine
2005 Spine
2002 Spine

Peers

Countries citing papers authored by Howard S. An

Since Specialization

Citations

This map shows the geographic impact of Howard S. An's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Howard S. An with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Howard S. An more than expected).

Fields of papers citing papers by Howard S. An

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Howard S. An. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Howard S. An. The network helps show where Howard S. An may publish in the future.

Co-authors

The 25 scholars most cited alongside Howard S. An, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Howard S. An Line = papers co-authored together Howard S. An links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	The Human Microbiome and Its Role in Musculoskeletal Disorders Genes ·Khaled Aboushaala, Arnold Yu Lok Wong, J. Nicolás Barajas, Perry Lim, Lena Al‐Harthi, Ana Chee, Christopher B. Forsyth, Chun‐do Oh, Sheila J. Toro, Frances M. K. Williams, Howard S. An, Dino Samartzis	2023	5
2	The Impact of COVID-19 Pandemic on Spine Surgeons Worldwide: A One Year Prospective Comparative Study Global Spine Journal ·J. Nicolás Barajas, Alexander L. Hornung, Timothy G. Kuzel, G. Michael Mallow, Grant J. Park, Samuel S. Rudisill, Philip K. Louie, Garrett K. Harada, Michael H. McCarthy, Niccole Germscheid, Jason Pui Yin Cheung, Marko H. Neva, Mohammad El‐Sharkawi, Marcelo Valacco, Daniel M. Sciubba, Norman Chutkan, Howard S. An, Dino Samartzis	2022	6
3	Prediction of lumbar disc herniation resorption in symptomatic patients: a prospective, multi-imaging and clinical phenotype study The Spine Journal ·Alexander L. Hornung, J. Nicolás Barajas, Samuel S. Rudisill, Khaled Aboushaala, Alexander W. Butler, Grant J. Park, Garrett K. Harada, Skylar F. Leonard, Ashley Roberts, Howard S. An, Anton Epifanov, H Albert, Alexander Tkachev, Dino Samartzis	2022	17
4	Risk Factors for Subsidence Following Anterior Lumbar Interbody Fusion Global Spine Journal ·Athan G. Zavras, Vincent P. Federico, Michael T. Nolte, Alexander J. Butler, Navya Dandu, Mohammed A. Munim, Daniel Harper, Gregory D. Lopez, Christopher J. DeWald, Howard S. An, Kern Singh, Frank M. Phillips, Matthew W. Colman	2022	19
5	Telemedicine in Spine Surgery: Global Perspectives and Practices Global Spine Journal ·Grant J. Riew, Francis Lovecchio, Dino Samartzis, Philip K. Louie, Niccole Germscheid, Howard S. An, Jason Pui Yin Cheung, Norman Chutkan, G. Michael Mallow, Marko H. Neva, Frank M. Phillips, Daniel M. Sciubba, Mohammad El‐Sharkawi, Marcelo Valacco, Michael H. McCarthy, Melvin C. Makhni, Sravisht Iyer	2021	18
6	Regional distribution of computed tomography attenuation across the lumbar endplate PLoS ONE ·Kazuyuki Segami, Alejandro A. Espinoza Orías, Hiroe Miyamoto, Koji Kanzaki, Howard S. An, Nozomu Inoue	2021	6
7	Micro-computed tomography analysis of the lumbar pedicle wall PLoS ONE ·Tomoyo Y. Irie, Tohru Irie, Alejandro A. Espinoza Orías, Kazuyuki Segami, Norimasa Iwasaki, Howard S. An, Nozomu Inoue	2021	5
8	Spine Surgery and COVID-19: The Influence of Practice Type on Preparedness, Response, and Economic Impact Global Spine Journal ·Joseph A. Weiner, Peter R. Swiatek, Daniel J. Johnson, Philip K. Louie, Garrett K. Harada, Michael H. McCarthy, Niccole Germscheid, Jason Pui Yin Cheung, Marko H. Neva, Mohammad El‐Sharkawi, Marcelo Valacco, Daniel M. Sciubba, Norman Chutkan, Howard S. An, Dino Samartzis	2020	9
9	Preoperative paraspinal neck muscle characteristics predict early onset adjacent segment degeneration in anterior cervical fusion patients: A machine‐learning modeling analysis Journal of Orthopaedic Research® ·Arnold Yu Lok Wong, Garrett K. Harada, Remy Lee, Sapan D. Gandhi, Adam Dziedzic, Alejandro A. Espinoza Orías, Mohamad Parnianpour, Philip K. Louie, Bryce A. Basques, Howard S. An, Dino Samartzis	2020	31
10	The Impact of COVID-19 Pandemic on Spine Surgeons Worldwide Global Spine Journal ·Philip K. Louie, Garrett K. Harada, Michael H. McCarthy, Niccole Germscheid, Jason Pui Yin Cheung, Marko H. Neva, Mohammad El‐Sharkawi, Marcelo Valacco, Daniel M. Sciubba, Norman Chutkan, Howard S. An, Dino Samartzis	2020	49
11	Lumbar facet joint subchondral bone density in low back pain and asymptomatic subjects Skeletal Radiology ·Chien-Chou Pan, Péter Simon, Alejandro A. Espinoza Orías, Ryota Takatori, Howard S. An, Gunnar B. J. Andersson, Nozomu Inoue	2019	7
12	Lumbosacral Epidural Lipomatosis: A Retrospective Matched Case-Control Database Study World Neurosurgery ·Baris Yildirim, Varun Puvanesarajah, Howard S. An, Wendy M. Novicoff, Amit Jain, Francis H. Shen, Hamid Hassanzadeh	2016	23
13	The Kinematics and Spondylosis of the Lumbar Spine Vary Depending on the Levels of Motion Segments in Individuals With Low Back Pain Spine ·Bryce A. Basques, Alejandro A. Espinoza Orías, Grant D. Shifflett, Michael P. Fice, Gunnar Andersson, Howard S. An, Nozomu Inoue	2016	12
14	Surgical Versus Nonoperative Treatment for Lumbar Spinal Stenosis Four-Year Results of the Spine Patient Outcomes Research Trial Spine ·James N. Weinstein, Tor D. Tosteson, Jon D. Lurie, Anna N.A. Tosteson, Emily Blood, Harry N. Herkowitz, Frank P. Cammisa, Todd J. Albert, Scott D. Boden, Alan S. Hilibrand, Harley Goldberg, Sigurd Berven, Howard S. An Hit paper breakdown →	2010	396
15	In Vivo Measurement of Lumbar Facet Joint Area in Asymptomatic and Chronic Low Back Pain Subjects Spine ·Yoshihisa Otsuka, Howard S. An, Ruth Ochia, Gunnar B. J. Andersson, Alejandro A. Espinoza Orías, Nozomu Inoue	2010	28
16	In Vivo Three-Dimensional Morphometric Analysis of the Lumbar Pedicle Isthmus Spine ·Keizo Sugisaki, Howard S. An, Alejandro A. Espinoza Orías, Richard Rhim, Gunnar B. J. Andersson, Nozomu Inoue	2009	20
17	A Prospective Cohort Analysis of Adjacent Vertebral Body Bone Mineral Density in Lumbar Surgery Patients With or Without Instrumented Posterolateral Fusion Spine ·Kern Singh, Howard S. An, Dino Samartzis, Ahmad Nassr, Jason Provus, M. D. Hickey, Gunnar B. J. Andersson	2005	12
18	Spine ·Raghu N. Natarajan, Robert B. Garretson, Ashok Biyani, Tae Hong Lim, Gunnar B. J. Andersson, Howard S. An	2003	1
19	Recombinant osteogenic protein‐1 upregulates extracellular matrix metabolism by rabbit annulus fibrosus and nucleus pulposus cells cultured in alginate beads Journal of Orthopaedic Research® ·Koichi Masuda, K Takegami, Howard S. An, Fumio Kumano, Kazuhiro Chiba, Gunnar B. J. Andersson, Thomas Schmid, Eugene J-M.A. Thonar	2003	145
20	The Ideal Amount of Lumbar Foraminal Distraction for Pedicle Screw Instrumentation Spine ·Akihiko Inufusa, Howard S. An, Michael Glover, Linda M. McGrady, Tae‐Hong Lim, Lee H. Riley	1996	27

About Howard S. An

Howard S. An is a scholar working on Pathology and Forensic Medicine, Pharmacology, Surgery, Health Informatics and Small Animals, having authored 431 papers that have together received 20.1k indexed citations. Recurring topics across this work include Spine and Intervertebral Disc Pathology (356 papers), Spinal Fractures and Fixation Techniques (148 papers), Musculoskeletal pain and rehabilitation (138 papers), Cervical and Thoracic Myelopathy (97 papers), Medical Imaging and Analysis (84 papers), Shoulder Injury and Treatment (36 papers), Scoliosis diagnosis and treatment (29 papers) and Pelvic and Acetabular Injuries (23 papers). The work is most often cited by research in Pathology and Forensic Medicine (16.0k citations), Pharmacology (7.5k citations), Surgery (13.4k citations), Orthopedics and Sports Medicine (951 citations) and Rheumatology (1.4k citations). Howard S. An has collaborated with scholars based in United States, Japan and South Korea. Frequent co-authors include Koichi Masuda, Gunnar B. J. Andersson, Tae‐Hong Lim, Victor M. Haughton, Eugene J-M.A. Thonar, Dino Samartzis, Atsushi Fujiwara, Kern Singh, Louis G. Jenis and Chadi Tannoury. Their work appears in journals such as Spine, The Spine Journal, European Spine Journal, Global Spine Journal and Journal of Bone and Joint Surgery.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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