“…The authors identified no phase 3 studies, 9 phase 2 studies, 2,10,12,13,16,27,28,31,51 and 20 phase 1 studies. 4,7,8,9,14,17,18,25,32,37,42,44,45,48,49,50,54,55,56,57 This means for phase 1 studies that illness perceptions, as prognostic factors, were reported without controlling for other prognostic factors. Therefore, the interpretation of reported associations and prognoses should be treated with caution.…”