[A trial to improve a niacin test paper (author's transl)].
D001431:Bacteriological Techniques; D006801:Humans; D008722:Methods; D009169:Mycobacterium tuberculosis / Q000302:isolation & purification*; D009539:Nicotinic Acids / Q000032:analysis*; D010209:Paper; D013183:Sputum / Q000382:microbiology
D009539:Nicotinic Acids