Changes

:<math>

:<math>

nref = 0.5 * depth * {1 + (lss - lrr)\over lss + lrr - 2 * lrs + 6 * depth} \  

nref_i = 0.5 * depth * (1 + {(lss_i - lrr_i)\over lss_i + lrr_i - 2 * lrs_i + 6 * depth_i}) \  

</math>

</math>

:<math>

:<math>

AB = {0.05 + \sum_i P_i(het) * nref\over 0.10 + \sum_i P_i(het)*depth}

AB = {0.05 + \sum_i P_i(het) * nref_i\over 0.10 + \sum_i P_i(het)*depth_i}

</math>

</math>