palliative radiotherapy 
Parks, Recreation and Tourism 
parthenolide 
Pathogen Reduction Technology 
patient refused test 
Performance Rating Table 
peroneal reaction time 
phenol red thread 
phosphoribosyltransferase 
Photoradiation therapy 
Pivotal Response Training 
plasma recalcification time 
platelet regeneration time 
postoperative radiotherapy 
preoperative radiation therapy 
preoperative radiotherapy 
pretectum 
primary retroperitoneal tumors 
prism reflection test 
progressive resistance training 
protease 
protease gene 
protein 
prothrombin 
Proton radiation therapy 
pulse rise time 
pyrantel pamoate