our intersects the points (eff0, 0), (1, tox1) and
(eff_star, tox_star). A unique curve intersects these three points and
identifies a value for p, the exponent in the L^p norm. On this neutral-
utility contour, scores are equal to zero. A family of curves with different
utility scores is defined that are "parallel" to this neutral curve.
Points with probabilities of efficacy and toxicity that are nearer to (1, 0)
will yield greater scores, and vice-versa.</p>
    
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