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  Indian J Med Microbiol
 

Figure 1: (a) The normal crest, (b) the high crest, (c) the low crest, and (d) the subclassifications of the low crest. Source: Courtesy of William J Robbins

Figure 1: (a) The normal crest, (b) the high crest, (c) the low crest, and (d) the subclassifications of the low crest. Source: Courtesy of William J Robbins