Skip to main content

Holiday schedule

Quest Diagnostics Patient Service Centers will have modified hours during the holiday season.

  • Closing early at 12:00pm on December 24, 2025
  • Closed on December 25, 2025
  • Closing early at 12:00pm on December 31, 2025
  • Closed on January 1, 2026


Have a healthy, happy holiday!

Hide
Quest Diagnostics

Free T4 Age-Specific Reference Intervals from Birth to the 10th Decade of Life Using Direct Dialysis

Free T4 Age-Specific Reference Intervals from Birth to the 10th Decade of Life Using Direct Dialysis

Authors: Bi C, Schindler EI, Li EM, Shirvani M, Marcelli M, Wong EC, Clarke NJ, Wu Z

Citation: Thyroid. 2025 Nov 3. doi: 10.1177/10507256251393709. Online ahead of print.

Specialties: Endocrinology, Cardiology, Cardiovascular, Pediatrics

Related content

Audio Podcast
Laboratory Testing for the Diagnosis and Management of Thyroid Disorders
Test FAQ
T4 Free
Test FAQ
TSH
Audio Podcast
Action From Insight: Tackling Insulin Resistance
Conference Presentation
Establishment of Infant Free T4 Reference Interval Through Indirect Methods

Our company

Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services.  Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services. 

 

Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.