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PSA was launched in July 1991 by David Hall, owner of the coin grading company Professional Coin Grading Service (PCGS), to serve collectors as a third-party card grader. [1] At the outset, the business faced difficulties owing to a limited demand from collectors who sought card grading services. [ 2 ]
Prostate-specific antigen (PSA), also known as gamma-seminoprotein or kallikrein-3 (KLK3), P-30 antigen, is a glycoprotein enzyme encoded in humans by the KLK3 gene.PSA is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland in men and the paraurethral glands in women.
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This article is a list of PSA men's number 1 ranked players in the Official Men's Squash World Ranking. The PSA Ranking are the Professional Squash Association's (PSA) merit-based method for determining the world rankings in men's squash. The top-ranked player is the player who, over the previous 12 months, has garnered the most PSA ranking points.
Prostate-specific antigen. Prostate-specific antigen (PSA) is secreted by the epithelial cells of the prostate gland and can be detected in a sample of blood. [14] PSA is present in small quantities in the serum of men with healthy prostates, but is often elevated in the presence of prostate cancer or other prostate disorders. [15]
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PSA Airlines: BLUE STREAK United States part of American Airlines Group: KST PTL Luftfahrtunternehmen: KING STAR Germany WIS Paccair: WISCAIR United States Y5 PCE Pace Airlines: PACE United States Pace Airlines as purchased by Hooters in December 2002. PAB Pacific Air Boats: AIR BOATS Canada PRC Pacific Air Charter: PACIFIC CHARTER United ...
This article is a list of PSA women's number 1 ranked players in the Official Women's Squash World Ranking. The Official Women's Squash World Ranking are the Professional Squash Association's (PSA) merit-based method for determining the world rankings in women's squash. The top-ranked player is the player who, over the previous 12 months, has ...