Numismatist noted numismatist who was not an avid collector, and King Farouk I of Egypt was an avid collector who had very little interest in numismatics. Harry Bass by comparison was a noted collector who was also a numismatist. The second group are the coin dealers. Often called professional numismatists, they authenticate or grade coins for commercial purposes. The buying and selling of coin collections by numismatists who are professional dealers advances the study of money, and expert numismatists are consulted by historians, museum curators, and archaeologists. See, for example, the International Association of Professional Numismatists (IAPN) and the British Numismatic
GuLF Study directly related to the spill, such as rashes, had gone. There is also little information about the pre-spill baseline health of the workers, whose work involves regular exposure to environmental hazards. According to epidemiologist Maureen Lichtveld, the main health effects are likely to be psychosocial, such as depression and increased alcohol use resulting from job losses. Reardon wrote that, given how economically depressed the community is, it will be difficult to demonstrate what is causing the stress-related illnesses the workers report. There has been concern that the study will collect health information without addressing the medical needs of the workers,