| AHT | aggregation half time; antihyaluronidase titer; augmented histamine test; autogenous hamster tumor |
|---|---|
| APTI | airway pressure time index |
| APTT, aPTT | activated partial thromboplastin time |
| ATB | at the time of the bomb [A-bomb in Japan]; atrial tachycardia with block |
| ATT | arginine tolerance test; aspirin tolerance time |
| LVETI | Left ventricular ejection time index |
|---|---|
| LTPA | Leisure Time Physical Activity |
| LDT | Lymphocyte doubling time |
| MALDI-TOF MS | Matrix Assisted Laser Desorption Ionization Time of Flight Mass Spectrometry |
| MALDI-TOF | Matrix-assisted laser desorption ionization time-of-flight |