Has your baby been diagnosed with biliary atresia?

Find out if your baby is eligible to participate in the BOLD Study.


The BOLD research study is the first pivotal Phase 3 study to evaluate the safety and efficacy of odevixibat in babies with biliary atresia who have undergone a Kasai hepatoportoenterostomy (HPE).

A clinical trial is a scientific study where researchers learn if and how a medication works. The BOLD study has been initiated by Albireo Pharma, a clinical-stage biopharmaceutical company focused on rare pediatric liver diseases and disorders.

What is biliary atresia?

Biliary atresia is a rare pediatric liver disease where damaged or absent bile ducts outside the liver result in bile and bile acids being trapped inside the liver. This may result in cirrhosis, and even liver failure. Symptoms typically develop two to six weeks after birth.

There are no approved medications for biliary atresia.

What is the BOLD study?

The BOLD (Biliary Atresia and the Use of Odevixibat in Treating Liver Disease) study is the first pivotal Phase 3 clinical trial for infants with biliary atresia. During a two-year period, the double-blind, randomized study will investigate how well and safely the investigational* drug odevixibat works. The trial will evaluate if a child with biliary atresia who has undergone a Kasai HPE can delay or avoid liver transplant by taking odevixibat.

The results from the trial will be shared with regulatory authorities that assess if odevixibat can be approved to treat biliary atresia.

*The term "investigational" means that odevixibat is not approved for use in biliary atresia or any other conditions anywhere in the world.

What is odevixibat?

The investigational medicine of the BOLD study, odevixibat, is a potent, non-systemic ileal bile acid transport inhibitor (IBATi) designed to treat rare pediatric cholestatic liver diseases such as biliary atresia. Odevixibat is a once-daily oral medication which may be emptied into breastmilk, formula, or certain soft foods.


Babies with a clinical diagnosis of biliary atresia, aged 90 days or less at the time of Kasai HPE, and who are able to start the study treatment within 3 weeks of their Kasai, may be eligible to participate.

There is a very small window of time where babies may be eligible, so it is important to talk to your baby's doctor right away.

More information may be found here: https://clinicaltrials.gov/ct2/show/NCT04336722.


Read the research study flyer

If you are a parent or guardian who would like to learn more about your child’s participation in the BOLD clinical trial, discuss it with your baby’s doctor. We’ve prepared a brochure that has information about the trial that you can give to your doctor.  

For more information

Ask your baby's doctor to call or email Albireo to learn about the BOLD Study. 

Phone: +1 (857) 378-2035
Email: [email protected]

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In order to be included in the clinical trial, the patient must be:

  • A male or female with a clinical diagnosis of biliary atresia
  • Aged 90 days or less at time of Kasai HPE
  • Eligible to start study treatment within 3 weeks post-Kasai HPE

Patients may be excluded from the trial if they:

  • Have intractable ascites
  • Had Ileal resection surgery
  • Have an ALT ≥10× upper limit of normal (ULN) at screening
  • Are on total parenteral nutrition at randomization
  • Have acute ascending cholangitis (patients may be randomized after resolution of acute ascending cholangitis)
  • Have choledochal cystic disease

Note: Your doctor will be able to determine if your child is able to participate in the BOLD study.

United States, California
Children's Hospital Los Angeles
Los Angeles, California, United States, 90027
Contact: Rohit Kohli, MD

Rady Children's Hospital
San Diego, California, United States, 92123
Contact: Kathleen Schwarz, MD

Stanford Children's Health
Palo Alto, California, United States, 94304
Contact: Amrita Narang, MD

UCSF Benioff Children's Hospital San Francisco
San Francisco, California, United States, 94158
Contact: Phillip Rosenthal, MD

United States, Colorado
Children's Hospital Colorado
Aurora, Colorado, United States, 80045
Contact: Shikha Sundaram, MD

United States, District of Columbia
Children's National Medical Center
Washington, District of Columbia, United States, 20010
Contact: Vahe Badalyan, MD

United States, Delaware
Nemours/Alfred I. duPont Hospital for Children
Wilmington, Delaware, United States, 19803
Contact: Adebowale Adeyemi, MD

United States, Florida
University of Miami
Miami, Florida, United States, 33146
Contact: Jennifer Garcia, MD

United States, Georgia
Children's Healthcare of Atlanta - Emory University School of Medicine
Atlanta, Georgia, United States, 30322
Contact: Saul Karpen, MD, PhD

United States, Illinois
Ann & Robert H. Lurie Children's Hospital
Chicago, IL 60611, United States, 60611
Contact: Sarah Taylor, MD

United States, Indiana
Indiana University school of Medicine
Indianapolis, Indiana, United States, 46202
Contact: Jean Molleston, MD

United States, Ohio
Cincinnati Children's Hospital
Cincinnati, Ohio, United States, 45229
Contact: Jorge Bezerra, MD

Cleveland Clinic
Cleveland, Ohio, United States, 44195
Contact: Vera Hupertz, MD

United States, Maryland
Johns Hopkins Children's Center
Baltimore, Maryland, United States, 21287
Contact: Wikrom Karnsakul, MD

United States, Massachusetts
Boston Children's Hospital
Boston, Massachusetts, United States, 02115
Contact: Andrew Wehrman, MD

United States, Michigan
University of Michigan Children's Hospital
Ann Arbor, Michigan, United States, 48109
Contact: Maclovio Lopez, MD

United States, Missouri
Children's Mercy Hospital
Kansas City, Missouri, United States, 64108
Contact: Ryan Fischer, MD

Washington University in St. Louis
Saint Louis, Missouri, United States, 63110
Contact: Janis M. Stoll, MD

United States, New York
The Children's Hospital at Montefiore
Bronx, New York, United States, 10467
Contact: Nadia Ovchinsky, MD

Icahn School of Medicine at Mount Sinai
New York, New York, United States, 10029
Contact: Jaime Chu, MD

NewYork-Presbyterian Morgan Stanley Children's Hospital
New York, New York, United States, 10032
Contact: Jennifer Vittorio, MD

United States, North Carolina
Duke University
Durham, North Carolina, United States, 27705
Contact: Alisha Mavis, MD

United States, Oregon
Oregon Health & Science University
Portland, Oregon, United States, 97239
Contact: Henry Lin, MD

United States, Pennsylvania
The Children's Hospital of Philadelphia
Philadelphia, Pennsylvania, United States, 19104
Contat: Kathleen Loomes, MD

UPMC Children's Hospital of Pittsburgh
Pittsburgh, Pennsylvania, United States, 15224
Contact: James Squires, MD

United States, Texas
UT Southwestern Medical Center   
Dallas, Texas, United States, 75390
Contact: Amal Aqul, MD

United States, Utah
University of Utah
Salt Lake City, Utah, United States, 84113
Contact: Kyle Jensen, MD

United States, Washington
Seattle Children's Hospital
Seattle, Washington, United States, 98105
Contact: Evelyn Hsu, MD

United States, Wisconsin
Medical College of Wisconsin
Milwaukee, Wisconsin, United States, 53226
Contact: Bernadette Vitola, MD

The Children's Hospital at Westmead
Sydney, Australia
Contact: Michael Stormon, MD

Royal Children's Hospital
Parkville, Australia
Contact: Winita Hardikar, PhD

Women's Children's Hospital
North Adelaide, Australia
Contact: Richard Couper, MD

Cliniques universitaires Saint-Luc
Brussels, Belgium
Contact: Etienne Sokal, MD, PhD

UZ Gent
Gent, Belgium
Contact: Ruth De Bruyne, MD, PhD

CHU Sainte-Justine
Montréal, Canada
Contact: Fernando Alvarez, MD

The Hospital for Sick Children
Toronto, Canada
Contact: Vicky Ng, MD

Children's Hospital of Fudan University
Shanghai, China
Contact: Ying Huang

Guangzhou Women and Children's Medical Center
Guangzhou, Guangdong, China
Contact: Jiakang Yu

Bicêtre Hospital
Le Kremlin-Bicêtre, France
Contact: Emmanuel Gonzales, MD, PhD

Hôpital Femme Mère Enfant
Bron, France
Contact: Mathias Ruiz, MD

Jeanne de Flandre Hospital
Lille, France
Contact: Madeleine Aumar, MD

Necker University Hospital - Enfants malades
Paris, France
Contact: Florence Lacaille, MD  

Charité - Universitätsmedizin Berlin
Berlin, Germany
Contact: Philip Bufler, MD

Hannover Medical School
Hanover, Germany
Contact: Ulrich Baumann, MD

Dr. von Hauner Children's Hospital LMU
Munich, Germany
Contact: Eberhard Lurz, MD

University Children´s Hospital Tuebingen
Tuebingen, Germany
Contact: Ekkehard Sturm, MD, PhD

University Medical Center Hamburg-Eppendorf UKE
Hamburg, Germany
Contact: Konrad Reinshagen, MD

Semmelweis Egyetem I.sz Gyermekgyógyászati Klinika
Budapest, Hungary
Contact: Antal Dezsöfi, MD, PhD

Shaare Zedek Medical Center
Jerusalem, Israel
Contact: Eyal Shteyer, MD

Schneider Children´s Medical Center of Israel
Petah tikva, Israel
Contact: Orith Waisbourd-Zinman, MD

ASST Papa Giovanni XXIII
Bergamo, Italy
Contact: Lorenzo D'Antiga, MD

ISMETT - Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione
Palermo, Italy
Contact: Silvia Riva, MD

Meyer Children´s University Hospital
Florence, Italy
Contact: Giuseppe Indolfi, MD, PhD

Ospedale Pediatrico Bambino Gesù
Roma, Italy
Contact: Giuseppe Maggiore, MD

Regina Margherita Children's Hospital
Turin, Italy
Contact: Pier Luigi Calvo, MD

University Hospital of Padova
Padova, Italy
Contact: Mara Cananzi, MD, PhD

Korea, Republic of
Samsung Medical Center
Seoul, Korea, Republic of
Contact: Yon Ho Choe, MD

Seoul National University Children's Hospital
Seoul, Korea, Republic of
Contact: Joong Kee Youn, MD

Hospital Raja Perempuan Zainab II
Kota Bharu, Malaysia
Contact: Wan Mohd Ruzaimie Wan Mohamad Noor, MD

University of Malaya Medical Centre
Kuala Lumpur, Malaysia
Contact: Way Seah Lee, MD

University Medical Center Groningen
Groningen, Netherlands
Contact: Hendrik Jan Verkade, MD, PhD

New Zealand
Starship Child Health
Auckland, New Zealand
Contact: Helen Evans, MD

Instytut Pomnik-Centrum Zdrowia Dziecka
Warsaw, Poland
Contact: Piotr Czubkowski, MD, PhD

Hospital Universitari Vall d'Hebron
Barcelona, Spain
Contact: Jesús Quintero, MD, PhD

National Taiwan University Hospital
Taipei, Taiwan
Contact: Huey-Ling Chen, PhD, MD

Taipei Veterans General Hospital
Taipei, Taiwan
Contact: Ching-Feng Huang, MD, PhD

Hacettepe University Ihsan Dogramaci Childrens Hospital
Ankara, Turkey
Contact: Hasan Özen, MD

Akdeniz University Medical Faculty
Antalya, Turkey
Contact: Reha Artan, MD

Istanbul University, Istanbul Medical Faculty
Istanbul, Turkey
Contact: Ozlem Durmaz, MD

United Kingdom
Birmingham Women's and Children's Hospital
Birmingham, United Kingdom
Contact: Chayarani Kelgeri, MD

Leeds General Infirmary
Leeds, United Kingdom
Contact: Naved Alizai

Biliary atresia is a rare pediatric liver disease that occurs in an estimated one out of every 15,000-20,000 live births in the United States and European Union. Though rare, it is the most common pediatric cholestatic liver disease and the leading cause of pediatric liver transplant across all diseases.

Symptoms typically develop about two to six weeks after birth due to damaged or missing bile ducts. With no pathway out of the liver, bile builds up and starts to destroy liver cells, which leads to scarring of the liver, called cirrhosis, and possibly liver failure.

There are currently no approved medications for biliary atresia. A Kasai HPE procedure can help reestablish bile flow from the liver to the gallbladder.

A clinical trial is a scientific study featuring human volunteers in which researchers seek to answer specific questions about a drug, vaccine, or other therapy. It may examine safety, effectiveness, side effects, or new ways of using existing treatments.

BOLD is a double-blind, randomized, placebo-controlled study.

  • Double-blind: trial participants, their families, and clinicians involved in the research study do not know if a participant is taking the investigation medication or a placebo.
  • Placebo: looks like the study drug but does not contain any of the medication. Researchers compare results from patients taking a placebo with those taking the study drug to see if the study drug works better.
  • Randomized: investigators randomly assign half the trial participants to the experimental group, which receives the drug, and the other half to the control group, which receives the placebo.


A clinical trial is usually described by the phase it is in. Each phase usually has a different purpose, a larger group of participants, and a longer study period.

  • Phase 1: Basic safety. Tests an experimental treatment on a small group of often healthy people to understand its safety and potential side effects, as well as to help find the correct dosage.
  • Phase 2: Effectiveness. Focuses on whether the medicine works on a larger group of people who have a specific disease or condition. Researchers continue to study safety, including short-term side effects. This phase can last several years.
  • Phase 3: Wider safety and effectiveness. Gathers more information about safety and effectiveness by studying much larger and more varied groups of people, often with different medication doses. A treatment may also be used in combination with other medications.
  • Upon completion of Phase 3, a company can submit the investigational medicine for review by a regulatory body such as the Food & Drug Administration (FDA) in the United States. Once that body reviews the data and agrees that the Phase 3 trial had positive results, it may approve the investigational medicine for use by patients within the territory it governs.
  • Phase 4: Long-term effects. After the FDA approves a medication for use, this phase examines a product in the largest set of patients to gauge long-term effectiveness of the treatment or intervention.


There are currently no approved medications for biliary atresia.

Albireo Pharma, Inc. is conducting the BOLD clinical trial. Learn more about Albireo’s commitment to families at www.albireopharma.com.