{HEAD ~ The different light sources} may allow for differentiation of different tissue types, for example, bone, fat, blood vessels, and nerves, where blue light is preferred for achieving {TAIL ~ good contrast} between nerves and other tissues 
{ HEAD ~ The different light sources } may allow for differentiation of different tissue types , for example , bone , fat , blood vessels , and nerves , where blue light is preferred for achieving { TAIL ~ good contrast } between nerves and other tissues
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