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. 2015 Apr 8;10(4):e0121537. doi: 10.1371/journal.pone.0121537

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© 2015 Weerakoon et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 2 — A—Pure cholesterol stone and pale areas of mixed cholesterol stone composed of cholesterol (1465, 1381, and 1056 cm^-1). B—Pigmented areas of mixed cholesterol stone composed of calcium bilirubinate (1658, 1631, 1573 and 1249 cm^-1), calcium carbonate (1462, 871 and 698 cm^-1) and calcium phosphate (1026, 606 and 505 cm^-1). C—Pigment stone composed of calcium bilirubinate (1658, 1627, 1566 and 1249 cm^-1). D—Pigment stone composed of calcium bilirubinate (1658, 1627, 1566 and 1249 cm^-1), calcium carbonate (1450, 694 1658, 1627, 1566 and 1249 cm^-1) and calcium phosphate (1080, 1033, 609 and 547 cm^-1). E—Pigment stone composed of calcium bilirubinate (1666, 1620, 1573 and 1249 cm^-1) and calcium palmitate (2916, 2846, 1543, 1103 and 756 cm^-1).