Principal Investigator

Joseph Liao

Principal Investigator

Joseph Liao is a urologic surgeon scientist recognized for his contributions in image-guided surgery, molecular diagnostics, and medical device development for urological diseases.  Dr. Liao holds the Kathryn Simmons Stamey endowed professorship at Stanford University, and serves as the vice chair for academic affaris, director of research, and co-director of the endourology fellowship in the Department of Urology.  He also directs the new NIH/NIDDK-funded K12 Urologic Research at Stanford (KUReS) training program for faculty scholars. Dr. Liao's clinical interests include bladder cancer, upper tract urothelial carcinoma, prostate cancer, and urinary stone disease.  

Dr. Liao graduated from Harvard College and earned his medical degree from Stanford School of Medicine. He completed his urology residency and fellowship in endourology & minimally invasive surgery at UCLA Medical Center.  Dr. Liao is an elected member of the American Society of Clinical Investigation and is the current President of the Engineering & Urology Society.

Faculty and Senior Scientists

Kathy Mach

Senior Research Scientist / Lab Manager
Joined: 2007

Kathy received her PhD in biochemistry from Vanderbilt then moved to Stanford for and postdoctoral training in Stuart Kim’s lab. She has been the lab manager since 2007 and has developed urine-based molecular diagnostics for urinary tract infections and bladder cancer.

Gene Shkolyar

Clinical Assistant Professor (Urologic Oncology)
Joined: 2018

Gene was born in Kyiv and moved to New York with his family when he was 3 years old. He received his MD at UCLA in 2015 and completed his urology residency and urologic oncology fellowship at Stanford. His research is focused on bladder cancer imaging, urine diagnostics, and clinical trial design.  

Tim Chang

Clinical Assistant Professor (Endourology)
Joined: 2009

Tim attended Princeton for college and received his MS from MIT.  He joined the lab as a medical student at Stanford, where he also subsequently completed his urology residency and endourology fellowship. Tim’s research focuses on kidney stone disease and AI applications in urology.

Postdoctoral Fellows & Residents

Jessie Ge

Urology Resident
Joined: 2021

Jessie attended Caltech for college and med school at Washington University in St. Louis, and completed a HHMI Medical Student Research Fellowship with Sam Gambhir at Stanford. She is spearheading technology development for magnetic surgical removal of kidney stones and precision health.

Zac Kornberg

Urology Resident
Joined: 2022

Zac is a San Francisco native, he completed his undergraduate degree at Columbia University and graduated from medical school at UCSF. He is currently a urology resident with interest in urologic oncology.  His research interests include development and validation urine-based diagnostics for bladder cancer.  

Daniel Massana 

Postdoctoral Scholar
Joined: 2022

A native of Spain, Daniel obtained his BS in Chemistry from the Universidad Autónoma de Madrid and his PhD in Chemistry from Clarkson University in New York in 2022. Daniel's research is focused on development of biomaterials for kidney stone removal and the interface between kidney stone disease, urinary tract infections, and biofilms.


Mark Laurie

Graduate Student
Joined: 2018

Mark received his BS in Biomedical Computation at Stanford and is currently a graduate student in Computational and Mathematical Engineering (CME). Mark is interested in development of multimodal AI algorithms to guide decision support system for bladder cancer detection and treatment.

Benjamin Park

High School Student

Joined: 2023

Benjamin is a high school student who is interested in AI-assisted image analysis.  He is working on a project to improve segmentation of bladder tumors in cystoscopy images.


Research Staff and Clinical Research Coordinators

Tim Lee

Data Scientist
Joined: 2019

Tim graduated from UCSD with a BS in human biology in 2017 and completed his MPH with a concentration in epidemiology and biostatistics at UC Berkeley in 2022.  He started as a clinical research coordinator in the lab and now manages and maintains the various lab datasets.  Outside of the lab, Tim enjoys playing his guitar, playing video games with friends, and reading fantasy books.

Vinh La

Clinical Research Coordinator
Joined: 2021

Vinh received his BA in global disease biology from UC Davis in 2020. Since joining the lab, Vinh recruits and consents human subjects, process biological samples, and collects data in the OR to support various projects in the lab. In his free time Vinh enjoys going on road trips, snowboarding, and rock climbing. 

Jin Long

Senior Biostatistician
Joined: 2021

Jin received his PhD in Biostatistics from Texas A&M University in 2010. In addition to his role in the lab, he is the senior biostatistician in the Stanford Center for Artificial Intelligence in Medicine & Imaging. His research interests include developing methods or programming on statistical modeling, machine learning and artificial intelligence using medicine and imaging data.

Gabriela Rodriguez

Clinical Research Coordinator
Joined: 2022

Originally from San Francisco, Gaby graduated from Lewis & Clark College in Portland, OR where she studied biology. She recruits patients from Stanford Hospital and Palo Alto VA.  When she's not with patients, in the lab, or in the operating room, Gaby enjoys traveling, spending time with her dogs, and going to Giants games. 

Grace Holton

Research Assistant
Joined: 2022

Grace received her BS in mathematics and chemistry from the University of Missouri. She joined the lab initially as part of the Stanford Pre-Renal Initiative undergraduate summer program. She engages in several projects related to kidney stone disease and bladder cancer.  Grace is an aspiring physician and in her free time enjoys exploring the bay area with her dog, Loki.