| PTB | patellar tendon bearing; prior to birth |
|---|---|
| PTR | patellar tendon reflex; patient termination record; patient to return; peripheral total resistance; ... |
| CDH | 1) Chronic Daily Headache = CTH = ... |
| CDH | ceramide dihexoside; congenital diaphragmatic hernia; congenital dislocation of hip; congenital dysp... |
| CHD | Chediak-Higashi disease; childhood disease; chronic hemodialysis; congenital or congestive heart dis... |