CTGRI Faculty

Scott Needle, M.D., FAAP

Principal Investigator


Healthcare Network of Southwest Florida

Dr. Needle is a pediatrician and serves as Co-Chief Medical Officer of the Healthcare Network of Southwest Florida in Naples, Florida. He joined Healthcare Network of Southwest Florida in 2007. He is a graduate of Johns Hopkins University School of Medicine in Baltimore, M.D. and did his internship and residency at the New England Medical Center/Floating Hospital for Children, Tufts University in Boston, M.A.

Jacfranz Guiteau, M.D.

Clinical Research Faculty


Kidney Transplant Surgeon

Lee Physician Group

Gulf Coast Medical Center

Dr. Guiteau is one of two kidney transplant surgeons at Gulf Coast Medical Center, the only transplant center in Southwest Florida between Tampa and Miami. He received a B.A. from Georgetown University, his M.D. from Emory University School of Medicine, and completed both his general surgery and abdominal transplant training at Baylor College of Medicine in Houston, Texas. While in training, he completed a two year research fellowship in partnership with the Human Genome Sequencing Center. His research included the development of a liver tissue biorepository and comparing the genomic profile of patients with hepatocellular carcinoma in the setting of cirrhosis from multiple causes. He is Board Certified in General Surgery.

Paul Stein, M.D.

Clinical Research Faculty

Dr. Paul M. Stein has had an exemplary career in medicine including 39 years in the private practice of Internal Medicine in St. Louis, Missouri. The last 8 years he had a highly successful concierge patient-centered practice. Dr. Stein graduated from the St. Louis University School of Medicine in 1971. Since that time he has been associated with the Washington University School of Medicine dating back to his internship, residency and chief residency, all in Internal Medicine and a 2 year fellowship program in Nephrology. He has spent many hours teaching medical students, interns and residents. He holds an appointment as Professor of Clinical Medicine at Washington University School of Medicine. Dr. Stein has served on numerous hospital committees and has received various awards for his teaching and leadership at those institutions. He served as chairman of the Pharmacy and Therapeutics committee at Barnes-Jewish Hospital for 15 years. He was instrumental in the founding and implementation of the Barnes-Jewish-Christian Hospital Group which currently employs over 400 doctors in St. Louis. He has been selected as “Best Doctors” in St. Louis and also “Best Doctors” in America annually for the last 15 years. Dr. Stein has been involved in multiple research studies and has written publications and spoken regarding his findings. Dr. Stein is board certified in Internal Medicine and is licensed to practice in Missouri and Florida.

Douglas Braun, Pharm.D., R.Ph., C.Ph.

Clinical Research Faculty


Florida Cancer Specialists

Dr. Braun has over 25 years’ experience practicing in community, long term care and clinical pharmacy settings. He is currently employed at Florida Cancer Specialists, where for the past two years has been counseling patients on their oral oncolytics, monitoring lab values per NCCN/Mfr. guidelines, plus reviewing medication orders for accuracy and appropriateness. Prior to his current position, he spent the prior 20+ years in the community and long term setting. In community pharmacy he filled prescriptions, counseled patients and communicated with clinicians to maximize therapy while reducing polypharmacy/costs to the patient. As a Consultant Pharmacist, he reviewed patient charts, inspected facilities to ensure regulatory compliance, and taught classes to train facility staff. In addition, most of these years he spent as a manager, hiring, training and supervision of staff, inventory control, report generation and analysis, plus supervision of claim adjudications. Dr. Braun is passionate about patient care and hosts “Ask the Pharmacist” and “Brown Bag” seminars, expo booths and patient newsletters on a regular basis to his community. He provides continuing education talks to clinicians, and am also certified to provide immunizations, blood pressure and diabetic screenings, and fit home medical equipment to patients.

Joseph G. Voelkel, Ph.D.

Clinical Research Faculty, Biostatistics



School of Mathematical Sciences

Rochester Institute of Technology

Dr. Voelkel has expertise in experimental design, quality control and improvement, reliability, and statistical modeling. He has consulted and provided industry training for dozens of Fortune 500 companies including Alcoa, IBM, Eastman Kodak, General Motors, Motorola, and Xerox. He is a member of the American Statistical Association, the Institute of Mathematical Statistics, and the American Society of Quality. He holds a B.S. in Mathematics from Rensselaer Polytechnic Institute, an M.S. in Industrial Engineering/Management Sciences from Northwestern University, and a Ph.D. in Statistics from University of Wisconsin-Madison.

Robert Pollack, M.D.

Clinical Research Faculty


Psychiatric Associates of Southwest Florida

Dr. Pollack is currently the CEO of Psychiatric Associates of Southwest Florida. His practice serves people from ages 18 and up. His current interests focus on the use of advanced genomics to aid in the determination of the most efficacious way to utilize psychotropic medications as well as the use of rTMS in the treatment of refractory depressions and other psychiatric illnesses. He received his medical degree from State University of New York and did his residency at the University of Florida. He is certified in the practice of psychiatry by the American Board of Psychiatry and Neurology and has been in practice for more than 20 years. Dr Pollack has been granted Life Fellow status by the American Psychiatric Association Board of Trustees.



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