Quantitative Measures of the Effect of the Melanocortin 1 Receptor on Human Pigmentary Status11Presented in part at ESDR Geneva 2002, Naysmith L, Ha T, Waterston K, et al: Melanocortin 1 receptor accounts for 50% of variation in a Northern European dataset. J Invest Dermatol 119:758, 2002 (abstr).