The NBRC also offers additional specialization credentialing for respiratory practitioners that hold its certifications .
The NBRC is the only organization in the United States which develops certification examinations for Registered Respiratory Therapists ( RRTs ) and Certified Respiratory Therapists ( CRTs ) .
The NBRC also offers additional specialization credentialing for respiratory practitioners that hold NBRC 's certifications .
The NBRC is the only organization in the United States which develops certification examinations for Registered Respiratory Therapists ( RRTs ) and Certified Respiratory Therapists ( CRTs ) .