Research Fellows

The Campbell Foundation

The Campbell Foundation was established in 1946 and is affiliated with Campbell Clinic Orthopaedics in Memphis, Tennessee. A scientific and charitable trust, The Campbell Foundation was founded by Dr. Willis C. Campbell’s partners to continue his commitment to the advancement of orthopaedic medicine. The Campbell Foundation receives support from grateful patients, physicians, resident and fellow alumni, staff, trustees, corporations and friends in the community.

The mission of The Campbell Foundation is to enhance quality of life through the science of orthopaedic medicine worldwide. Since its inception, The Campbell Foundation has been committed to advancing surgeon education, orthopaedic research and community healthcare.

In recent years, we have focused on strengthening and building our clinical and biomechanical research infrastructure, which includes multiple research nurse coordinators, database access to track patient outcomes, a biomechanics laboratory and an extensive orthopaedic library staffed by a full‐time librarian. We currently are conducting over 150 active clinical and biomechanical research projects, sharing our research at regional, national, and international meetings, and in academic and scientific publications.

Key Campbell Foundation/Research Staff

Jenny Koltnow; Executive Director

Since 2020, Jenny has led the Foundation staff, including responsibilities for development and research processes. This includes:

  • Securing funding to support the Foundation’s orthopaedic research, surgeon education and community outreach programs
  • Identification, cultivation, solicitation and stewardship of donors
  • Education of and communication with current and prospective donors about our mission and programs (Website, Social Media, Momentum, Campbell in Motion, etc.)
  • Coordination and implementation of clinical and translational research studies and associated scientific publications and regulatory affairs

Karen Romer, RN, BSN; Research Nurse Coordinator 

Karen joined The Campbell Foundation Staff in 2017. She coordinates all research projects for the Neuromuscular/Cerebral Palsy Clinic and participates in patient care at the Clinic. She assists with pediatric orthopaedic research at Campbell Clinic and Le Bonheur Children’s Hospital. Her duties include reviewing new research protocols and providing feedback on feasibility, preparing documentation for initial and continuing IRB review and ensuring that all research procedures are conducted per the protocol. She recruits potential research participants, collecting and maintaining data as needed.

Jonathan Rowland, BS, CCRP; Clinical Research Coordinator

With more than 17 years of pediatric research experience, Jonathan joined the Le Bonheur Children’s Hospital Department of Pediatric Orthopedics in March, 2018. He assumes primary responsibility for the coordination of orthopaedic clinical research studies at Le Bonheur, organizing and managing activities related to initial and continuing IRB review and serving as study contact. He reviews patient records, recruits potential research participants, collects data and ensures that all procedures are conducted in compliance with the protocol, federal regulations and Good Clinical Practice guidelines.

Editorial Staff

The Editorial Staff is a resource available for fellows. Services include:

  • Graphic design, research, writing and editing of orthopaedic publications and presentations for staff physicians and residents
  • Maintenance of publication library
  • Coordination of surgeon residency and fellowship programs to include interview process, selection, correspondence, credentialing and record keeping

Former Pediatric Research Fellows

Physician Fellowship Year Current Location
Nelson Astur Neto, MD 2011-2012 Instituto Astur
São Paulo, Brazil
Vinayak Perake, MD 2012-2013 New York City Health + Hospitals
Queens, NY
Rodrigo Góes Medéa de Mendonça, MD 2015-2016 Hospital Santa Casa
São Paulo, Brazil
Felipe Augusto Garcez de Campos, MD 2018 Brazil

Nelson Astur, MD

Dr. Astur received his medical degree from the University of São Paulo (USP) in 2006 and completed his residency in Orthopedics and Traumatology at Santa Casa de São Paulo ‐ Fernandinho Simonsen Pavilion in 2009.

With a specialization in spine surgery, Dr. Astur worked in renowned hospitals such as the Israelita Albert
Einstein Hospital and was a Fellow at the University of Tennessee, where he specialized in Pediatric Column and Deformities (Campbell Clinic Orthopedics) and Surgery Minimally Invasive Spine (Semmes‐Murphy Neurologic and Spine Institute) in the years 2011 and 2012.

Dr. Nelson Astur is a member of the Brazilian Society of Orthopedics and Traumatology, Brazilian Society of Spine , American Academy of Orthopedic Surgeons, a member of the Scoliosis Research Society, the North American Spine Society, and the Board of Directors of Brazil's AO Spine chapter.

Rodrigo Góes Medéa de Mendonça, MD

Dr. Góes Medéa de Mendonça graduated in 2008 from the Faculty of Medical Sciences of Santa Casa de São Paulo. He was trained in Orthopedics and Traumatology and Surgery of the Vertebral Column by the "Fernandinho Simomsen Pavilion" ‐ Hospital of the Brotherhood of Santa Casa de Misericórdia de São Paulo. He was a Fellow at the Campbell Clinic at the University of Tennessee Health Science Center in 2015‐2016. He is a member of the Brazilian Society of Orthopedics and Traumatology, the Brazilian Society of Spinal Surgery,the Brazilian Society of Pediatric Orthopedics, and the North American Spine Society.

Recent Publications

Our latest published research includes:

Original Research

  • Amoli MA, Sawyer JR, Ellis RT, Seymour J, Spence DD, Kelly DM, Warner WC Jr. Pediatric Patients with Spondylolysis Have High Rates of Vitamin‐D Deficiency. J Surg Orthop Adv. 2019 Winter;28(4):257‐259. PMID: 31886760 (DMK, JRS, DDS, WCW) (2019)
  • Roaten JD, Kelly DM, Yellin JL, Flynn JM, Cyr M, Garg S, Broom A, Andras LM, Sawyer JR. Pediatric Femoral shaft Fractures: A Multicenter Review of the AAOS Clinical Practice Guidelines Before and After 2009. J Pediatr Orthop. 2019 Sep;39(8):394‐399. doi: 10.1097/BPO.0000000000000982. PMID: 31393292. (DMK, JRS) (2019)
  • Wu JC, Daley E, Koueiter DM, Lilly R, Vara AD, Settecerri JJ. Operating Room Intervention Rates After Orthopaedic Resident‐reduced Pediatric Both‐Bone Forearm Fractures Relative to the Academic Calendar. J Pediatr Orthop. 2019 Aug 14. i: 10.1097/BPO.0000000000001441. [Epub ahead of print]. PMID: 31425402 (DMK) (2019)

Review Articles

  • Conlan TK, Beebe MJ, Weinlein JC. New Imaging, Diagnostic, and Assessment Techniques in Orthopedic Trauma. Orthop Clin North Am. 2019 Jan;50(1):47‐56. PMID: 30477706 (MJB, JCW) (2019)


  • Brown DW, Sheffer BW. Pediatric Septic Arthritis: An Update. Orthop Clin North Am. 2019 Oct;50(4):461‐470. doi: 10.1016/j.oc.2019.05.003. Epub 2019 Aug 2. Review. PMID: 31466662 (BWS) (2019)
  • Conlan TK, Beebe MJ, Weinlein JC. New Imaging, Diagnostic, and Assessment Techniques in Orthopedic Trauma. Orthop Clin North Am. 2019 Jan;50(1):47‐56. PMID: 30477706 (MJB, JCW)(2019)

Research Grants

  • Long Term Outcomes and Quality of Life Measures of EOS Patients. From Depuy Synthes Spine. $47,500 (JRS) (2019‐2021)
  • Long Term (> 10 year) Assessment of Outcomes from Surgical Treatment of Early Onset Scoliosis: Development of Methodology and Outcomes Assessment Tools. From Pediatric Orthopaedic Society Mircrogrant. $3,000 (JRS) (2018‐2019)
  • The Treatment of Pediatric Diaphyseal Femur Fractures: A Clinical Trial Planning Grant. From Pediatric Orthopaedic Society of American. $30,000 (JRS) (2017‐2019)


  • Kelly DM, Sawyer JR. Lateral Condylar and Capitellar Fractures of the Distal Humerus. In Waters PM, Skaggs DL, Flynn JM, editors. Rockwood and Wilkins' Fractures in Children, 9th ed. Philadelphia, Wolters Kluwer, 2019. (DMK, JRS) (2019)

*updated April 2020