| PTAFR | platelet activating factor receptor |
|---|---|
| RAS | rapid atrial stimulation; recurrent aphthous stomatitis; reflex activating stimulus; reliability, av... |
| SF | Sabin-Feldman [test]; safety factor; salt-free; scarlet fever; screen film; seminal fluid; serosal f... |
| TF | free thyroxine; tactile fremitus; tail flick [reflex]; temperature factor; testicular feminization; ... |
| OAF | open air factor; osteoclast activating factor |