77 Anita van den Biggelaar et al., “Long-Term Treatment of Intestinal Helminths In creases Mite Skin-Test Reactivity in Gabonese Schoolchildren”, Journal of Infectious Diseases 189 (2004), 892–900.

78 R. W. Summers et al., “Trichuris suis Therapy in Crohn’s Disease”, Gut 54 (2005), 87–90.

79 Charlotte Schubert, “The Worm Has Turned”, Nature Medicine 10 (2004), 1204–1271.

80 Christopher Lowry, “Functional Subsets of Serotonergic Neurones”, Journal of Neuroendocrinology 14 (2002), 911–923; Christopher

Lowry et al., “Modulation of Anxiety Circuits by Serotonergic Systems”, Stress 8 (2005), 233–246.

81 Rose-Marie Bluthe et al., “Central Injection of IL-10 Antagonizes the Behavioral Effects of Lipopolysaccharide in Rats”, Psychoneuroendocrinology 24 (1999), 301–311.

82 Marianne Wamboldt et al., “Familial Association Between Allergic Disorders and Depression in Adult Finnish Twins”, American Journal of Medical Genetics 96 (2000), 146–153.