“…Validated instruments assessing illness and treatment attitudes and beliefs [14,35,52,64], associated with adherence [65,66] in some studies but not in others [67,68], may better explain the influence of negatively biased response to neutral stimuli on adherence [69]. Larger studies would also assess the influence of acculturation [70] and ethnicity on locus of control, somatization [71], and health beliefs [72], as a confounding effect may better explain the relationship between the somatoform scale and adherence.…”