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 Indian J Med Microbiol  
 

(A-B): Sonographic sub-types of cholesterol gallstones showing (A) full moon, (B) half moon. (C-D): Sonographic sub-types of cholesterol gallstones showing (C) crescent and (D) comet tail shapes

(A-B): Sonographic sub-types of cholesterol gallstones showing (A) full moon, (B) half moon.
(C-D): Sonographic sub-types of cholesterol gallstones showing (C) crescent and (D) comet tail shapes