There are multiple definitions:

1. randomized clinical/controlled trial(English)

   • ROM, CCT, CBA, ITS, QRCT
   • Clinical trials
   • https://doi.org…/1471-2288-5-24
   • https://www.clinicaltrials.gov/

2. reverse cholesterol transport(English)

   • mechanism by which the body removes excess cholesterol from peripheral tissues and delivers them to the liver, where it will be redistributed to other tissues or removed from the body by the gallbladder
   • HDL, LDL, LCAT, MO, TO, TP
   • Vascular disease
   • https://doi.org…SAHA.119.312617
   • https://doi.org…93/jn/133.3.689

3. root canal treatment/therapy(English)

   • a dental treatment for removing infection from inside a tooth; aka endodontic therapy
   • ATT
   • Dentistry, Therapeutic approaches
   • https://www.may…al/sls-20076717
   • https://doi.org…903-023-03733-1

4. Rorschach content test(English)

   • Psychology

5. rotator cuff tear(English)

   • KSS, RCR, AI, CSA, CTA, IM, LAA, OA, PCC
   • Physical therapy, Shoulder and other joints, Sports medicine
   • https://doi.org…363546518768813
   • https://doi.org…2891-017-1559-4