| PMA | index of prevalence and severity of gingivitis, where P = papillary gingiva, M = marginal gingiva, a... |
|---|---|
| PPCRA | pigmented paravenous chorioretinal atrophy |
| PPMA | progressive postmyelitis muscular atrophy |
| PSMA | proximal spinal muscular atrophy |
| SBMA | spinal bulbar muscular atrophy |