THE JUNIOR CLERK'S NIGHTMARE: A Problem in Lab Test Selection

... His leanness prompts you to screen for malabsorption with a serum carotene ($16) and a d-xylose test ($20), and to rule out Addison's disease you get an ACTH ($64), 24-hour 17-ketogenic steroids ($18) and 17-ketosteroids...
http://www.pathguy.com/lectures/lab-prob.htm

 

21CFR862

... 862.1815 Vitamin E test system. 862.1820 Xylose test system. ... [52 FR 16122, May 1, 1987, as amended at 53 FR 21449, June 8, 1988] Sec. 862.1820 Xylose test system. (a) Identification. A...
http://www.fda.gov/cdrh/yr2000/cfr/862.html

 
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