COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH:

Key Record Dates Identifier: NCT01185808
Brief Title: Vitamin D Supplementation in Chronic Rhinosinusitis With Nasal Polyps (VDinCRS)

First Submitted : July 30, 2010
First Submitted that Met QC Criteria : August 19, 2010
First Posted : August 20, 2010 (Estimate)

Last Update Submitted that Met QC Criteria : April 27, 2018
Last Update Posted : May 1, 2018