

reticular activating system


rapid atrial stimulation


recurrent aphthous stomatitis


Reliability, Availability, Serviceability


renal artery stenosis


renin-angiotensin system


Ribi adjuvant system

rabbit aortic strip

rabbit aortic strips

radiologist aid system

Radix Angelicae Sinensis

rapidly adapting afferents

rat aortic strips

rate of ankle swelling

Rathus Assertiveness Schedule

reality-adaptive, supportive

receptor antagonists

reflex activating stimulus

Registered Addiction Specialist

Relational Aggression Scale

relative aerobic strain

renal arterial stenosis

renal arteries

renal artery stenoses

renal artery stent

renin-aldosterone system

renin-angiotensin

renin-angiotensin systems

renin-angiotensin-aldosterone system

rennin-angiotensin system

residency application service

resin acids

retinoic acid syndrome

retinoic acids

retrovirus associated sequence

rheumatoid arthritis serum

Rhythmic auditory stimulation

right angle light scatter

ring sideroblasts

ringed sideroblasts