J. Altmann et al., “Body Size and Fatness of Free-Living Baboons Reflect Food availability and Activity Level,” Am J Primat 30 (1993): 149; J. Kemnitz et al., “Effects of Food Availability on Insulin and Lipid Levels in Free-Ranging Baboons,” Am J Primat 57 (2002): 13; W. Banks et al., “Serum Leptin Levels as a Marker for a Syndrome X–Like Condition in Wild Baboons,” J Clin Endo and Metabolism 88 (2003): 1234.