| Abbreviations | Meaning |
 | BRR | Bannayan-Riley-Ruvalcaba [syndrome]; Baroreceptor Reflex Response; Breathing Reserve Ratio |
 | JBS | Johanson-Blizzard Syndrome |
 | GUSTO-IIB | Global Use Of Strategies To Open Occluded Arteries In Acute Coronary Syndromes [trial] |
 | IHS | Idiopathic Hypereosinophilic Syndrome |
 | PMS | Perimenstrual Syndrome |
 | POTS | Plain Old Telephone Service; Postural Orthostatic Tachycardia Syndrome |
 | ZES | Zollinger-Ellison Syndrome; Zutphen Elderly Study |
 | ABS | Amniotic Band Syndrome |
 | HHH | Hyperornithinemia, Hyperammonemia, Homocitrillinuria [syndrome] |
 | FVS | Fetal Valproate Syndrome; Fig Virus S |
 | NKHS | Nonketotic Hyperosmolar Syndrome; Normal Krebs-Henseleit Solution |
 | SRUS | Solitary Rectal Ulcer Syndrome |
 | PHS | Pseudoprogeria-Hallermann-Streiff [syndrome] |
 | SSS | Sick Sinus Syndrome |
 | ITFS | Iliotibial Tract Friction Syndrome; Incomplete Testicular Feminization Syndrome |