| PTLD | posttransplanatation lymphoproliferative disorder; prescribed tumor lethal dose |
|---|---|
| PTSD | posttraumatic stress disorder |
| RPMD | rheumatic pain modulation disorder |
| SAD | Scale of Anxiety and Depression; seasonal affective disorder; Self-Assessment Depression [scale]; se... |
| SD | Sandhoff disease; senile dementia; septal defect; serologically defined; serologically detectable; s... |