the J stands for Jumper as in Air Force Pararescue Jumper. The term Pararescue Jumper is a retronym of the initials 'PJ' that were used on an Air Force Form 5 (Aircrew Flight Log) to identify anyone who is onboard in order to jump from the aircraft..Source(s): http://en.wikipedia.org/wiki/United_Stat...he J stands for Jumper as in Air Force Pararescue Jumper. The term Pararescue Jumper is a retronym of the initials 'PJ' that were used on an Air Force Form 5 (Aircrew Flight Log) to identify anyone who is onboard in order to jump from the aircraft..
Virologists are microbiologists who study microorganisms that quickly duplicate, resulting in the rapid spreading of viruses. Their primary work is to figure out how diseases like AIDS, SARS and hepatitis spread, in order to prevent more rampant development and to assist in vaccine development.
Nephrologists are doctors who specialize in kidney health. They treat illnesses such as kidney stones and chronic kidney disease, and they offer preventive care for kidney health. They prescribe medication such as steroids, and they help your body regulate electrolytes and bodily fluids. Nephrologists also treat patients with diseases that harm the kidneys, such as lupus, hypertension and hepatitis B. For patients with kidney failure, nephrologists provide life-saving dialysis.